diff --git a/src/module/Module_Common.bas b/src/module/Module_Common.bas
index 8bf0f9b..62f3fe3 100644
--- a/src/module/Module_Common.bas
+++ b/src/module/Module_Common.bas
@@ -22,6 +22,116 @@ Function GetLastDataRow(ByVal ws As Worksheet, ByVal columnNum As Long) As Long
     GetLastDataRow = ws.Cells(ws.Rows.Count, columnNum).End(xlUp).Row
 End Function
 
+' @return dict : key = keyCol，value = Array
+' @param sheetName
+' @param keyCol    
+' @param valueCols     Array(4,5,6)
+' @param startRow      default is 7
+Function LoadLookup( _
+    ByVal sheetName As String, _
+    ByVal keyCol As Long, _
+    ByVal valueCols As Variant, _
+    Optional ByVal startRow As Long = 7 _
+) As Object
+    
+    ' --- validate ---
+    If Trim(sheetName) = "" Then Exit Function
+    If Not IsArray(valueCols) Then
+        valueCols = Array(valueCols)
+    End If
+    Dim nValCols As Long: nValCols = UBound(valueCols) - LBound(valueCols) + 1
+    If nValCols = 0 Then Exit Function
+    
+    ' --- obtain worksheet ---
+    On Error Resume Next
+    Dim ws As Worksheet: Set ws = ThisWorkbook.Worksheets(sheetName)
+    On Error GoTo 0
+    If ws Is Nothing Then Exit Function
+    
+    ' --- obtain data（based on keyCol）---
+    Dim lastRow As Long: lastRow = ws.Cells(ws.Rows.Count, keyCol).End(xlUp).Row
+    If lastRow < startRow Then Exit Function
+    
+    ' --- prepare col ---
+    Dim minCol As Long: minCol = keyCol
+    Dim maxCol As Long: maxCol = keyCol
+    Dim i As Long
+    For i = LBound(valueCols) To UBound(valueCols)
+        If Not IsNumeric(valueCols(i)) Then Exit Function
+        Dim colNum As Long: colNum = CLng(valueCols(i))
+        If colNum < 1 Then Exit Function
+        If colNum < minCol Then minCol = colNum
+        If colNum > maxCol Then maxCol = colNum
+    Next i
+    
+    ' --- read ---
+    Dim dataRange As Range
+    Set dataRange = ws.Range(ws.Cells(startRow, minCol), ws.Cells(lastRow, maxCol))
+    Dim data As Variant: data = dataRange.Value
+
+    ' --- Ensure data is a 2D array ---
+    If Not IsArray(data) Then
+        ' Single cell case
+        Dim temp As Variant
+        ReDim temp(1 To 1, 1 To (maxCol - minCol + 1))
+        temp(1, 1) = data
+        data = temp
+    End If
+    
+    ' --- build ---
+    Dim keyOffset As Long: keyOffset = keyCol - minCol + 1
+    Dim valOffsets() As Long: ReDim valOffsets(0 To nValCols - 1)
+    For i = 0 To nValCols - 1
+        valOffsets(i) = valueCols(LBound(valueCols) + i) - minCol + 1
+    Next i
+    
+    ' --- write into  ---
+    Dim dict As Object: Set dict = CreateObject("Scripting.Dictionary")
+    dict.CompareMode = vbTextCompare
+    
+    Dim r As Long
+    For r = 1 To UBound(data, 1)
+        Dim key As String: key = Trim(data(r, keyOffset))
+        If key <> "" Then
+            Dim vals() As String: ReDim vals(0 To nValCols - 1)
+            Dim j As Long
+            For j = 0 To nValCols - 1
+                vals(j) = Trim(data(r, valOffsets(j)))
+            Next j
+            dict(key) = vals
+        End If
+    Next r
+    
+    Set LoadLookup = dict
+End Function
+
+Function GetLastDataRowInRange(ws As Worksheet, ByVal startCol As Long, ByVal endCol As Long, Optional ByVal startRow As Long = 7) As Long
+    ' --- validate ---
+    If startCol < 1 Then
+        Err.Raise 1001, "GetLastDataRowInRange", "startCol must >= 1"
+    End If
+    If endCol < 1 Then
+        Err.Raise 1002, "GetLastDataRowInRange", "endCol must >= 1"
+    End If
+    If endCol < startCol Then
+        Err.Raise 1003, "GetLastDataRowInRange", "endCol must >= startCol"
+    End If
+    If startRow < 1 Then
+        Err.Raise 1004, "GetLastDataRowInRange", "startRow must >= 1"
+    End If
+
+    ' --- query max row ---
+    Dim colIndex As Long, lastRow As Long, maxRow As Long
+    
+    maxRow = startRow - 1
+    For colIndex = startCol To endCol
+        lastRow = ws.Cells(ws.Rows.Count, colIndex).End(xlUp).Row
+        If lastRow > maxRow Then maxRow = lastRow
+    Next colIndex
+    
+    GetLastDataRowInRange = maxRow
+End Function
+
 Sub ClearDataRows(ByVal ws As Worksheet, ByVal startRow As Long, ByVal columnNum As Long)
     Dim lastRow As Long
     lastRow = ws.Cells(ws.Rows.Count, columnNum).End(xlUp).Row
diff --git a/src/thisWorkbook/Master_M1_Kukan.bas b/src/thisWorkbook/Master_M1_Kukan.bas
index de7e87f..4831f45 100644
--- a/src/thisWorkbook/Master_M1_Kukan.bas
+++ b/src/thisWorkbook/Master_M1_Kukan.bas
@@ -1,189 +1,143 @@
-' CSV Header Constants
+' ====== (222) =======
+
+' ====== Constants ======
+Const START_COL As Long = 3
+Const END_COL As Long = 14
+
+Private z1Cache As Object '
+
+' ====== Function ======
+Public Sub RefreshZ1Cache()
+    Set z1Cache = LoadLookup("Z1", keyCol:=3, valueCols:=Array(4), startRow:=7)
+End Sub
+
+' Get CSV header from row 5 (columns C to N)
+Function GetM1CSVHeader(ByVal ws As Worksheet) As Variant
+    Dim headerArr(1 To 1, 1 To 12) As String
+    Dim i As Long
+    
+    For i = 1 To 12
+        headerArr(1, i) = Trim(ws.Cells(5, i + 2).Value)  ' i+2: 1→3(C), 12→14(N)
+    Next i
+    
+    GetM1CSVHeader = headerArr
+End Function
 
 Private Sub Worksheet_Change(ByVal Target As Range)
-    ' === Fill D, E when C column changes ===
-    If Target.Column = 3 And Target.Row >= 7 Then
+    ' === Fill D, E columns when C column changes ===
+    If Target.Column = 4 And Target.Row >= 7 Then
+        If z1Cache Is Nothing Then Call RefreshZ1Cache
+
         Dim cell As Range
         For Each cell In Target
-            If Trim(cell.Value) = "" Then
-                Call ClearRowData(Me, cell.Row)
+            Dim dVal As String: dVal = Trim(cell.Value)
+            If dVal = "" Then
+                Me.Cells(cell.Row, 5).ClearContents
             Else
-                Call FillFromZ1(Me, cell.Row)
+                If Not z1Cache Is Nothing And z1Cache.Exists(dVal) Then
+                    Dim vals As Variant: vals = z1Cache(dVal)
+                    Me.Cells(cell.Row, 5).Value = vals(0)
+                Else
+                    Me.Cells(cell.Row, 5).ClearContents
+                End If
             End If
         Next
     End If
 End Sub
 
-Sub FillFromZ1(ByVal ws As Worksheet, ByVal rowNum As Long, Optional ByVal setG As Boolean = True)
-    Dim wsZ1 As Worksheet
-    Dim lastRow As Long
-    Dim i As Long
-    Dim code As String
-    
-    On Error Resume Next
-    Set wsZ1 = ThisWorkbook.Worksheets("Z1")
-    If wsZ1 Is Nothing Then Exit Sub
-    On Error GoTo 0
-    code = Trim(ws.Cells(rowNum, 3).Value)
-    If code = "" Then Exit Sub
-    lastRow = wsZ1.Cells(wsZ1.rows.Count, 3).End(xlUp).Row
-    
-    For i = 7 To lastRow
-        If Trim(wsZ1.Cells(i, 7).Value) = code Then
-            ws.Cells(rowNum, 4).Value = Trim(wsZ1.Cells(i, 4).Value)
-            ws.Cells(rowNum, 4).Value = Trim(wsZ1.Cells(i, 4).Value)
-            ws.Cells(rowNum, 5).Value = Trim(wsZ1.Cells(i, 6).Value)
-            ws.Cells(rowNum, 6).Value = Trim(wsZ1.Cells(i, 7).Value)
-            ws.Cells(rowNum, 7).Value = Trim(wsZ1.Cells(i, 9).Value)
-            If setG Then
-                ws.Cells(rowNum, 7).Value = "1"
-            End If
-            Exit Sub
-        End If
-    Next
-    
-    Call ClearRowData(ws, rowNum)
+Sub FillFromZ1(ByVal rowNum As Long)
+    Dim ws As Worksheet: Set ws = ActiveSheet
+    Dim code As String: code = Trim(ws.Cells(rowNum, 3).Value)
+    If code = "" Then
+        Call ClearRowData(ws, rowNum)
+        Exit Sub
+    End If
+
+    If z1Cache Is Nothing Then Call RefreshZ1Cache
+    If z1Cache Is Nothing Then Exit Sub
+
+    If z1Cache.Exists(code) Then
+        Dim vals As Variant: vals = z1Cache(code)
+        
+        ws.Cells(rowNum, 4).Value = vals(0)
+        ws.Cells(rowNum, 5).Value = vals(1)
+    Else
+        Call ClearRowData(ws, rowNum)
+    End If
 End Sub
 
 
 Sub ClearRowData(ByVal ws As Worksheet, ByVal rowNum As Long)
-    ' Clear from D column onwards
+    ' Clear columns D onwards
     ws.Range(ws.Cells(rowNum, 4), ws.Cells(rowNum, 15)).ClearContents
     ws.Cells(rowNum, 6).Validation.Delete
-    ws.Cells(rowNum, 19).ClearContents ' Q column error info
+    ws.Cells(rowNum, 19).ClearContents ' Column Q - error info
 End Sub
 
 Sub M1_Import()
-    Dim filePath As String
-    Dim fileDialog As fileDialog
     Dim wsTarget As Worksheet
-    Dim stream As Object
-    Dim textContent As String
-    Dim lines As Variant
+    Dim csvData As Variant
     Dim i As Long
-    Dim dataArray As Variant
-    Dim code As String
-    Dim lastRow As Long
-    Dim r As Long
+    Dim writeRow As Long
+    
     ' Target this worksheet
     Set wsTarget = Me
     
     ' === Step 1: Select CSV file ===
-    Set fileDialog = Application.fileDialog(msoFileDialogFilePicker)
-    With fileDialog
-        .Filters.Clear
-        .Filters.Add "CSV Files", "*.csv"
-        .AllowMultiSelect = False
-        If .Show <> -1 Then Exit Sub
-        filePath = .SelectedItems(1)
-    End With
+    Dim filePath As String
+    filePath = SelectCSVFile()
+    If filePath = "" Then Exit Sub
     
-    ' === Step 2: Read CSV with Shift-JIS ===
-    Set stream = CreateObject("ADODB.Stream")
-    With stream
-        .Type = 2
-        .Charset = "shift_jis"
-        .Open
-        .LoadFromFile filePath
-        textContent = .ReadText
-        .Close
-    End With
-    
-    lines = Split(textContent, vbLf)
-    
-    ' === Validate CSV header ===
-    If UBound(lines) >= 0 And Trim(lines(0)) <> "" Then
-        Dim csvHeader As String
-        csvHeader = Trim(lines(0))
-        ' Validate column count
-        Dim expectedCount As Long
-        expectedCount = UBound(Split(CSV_HEADER, ",")) + 1
-        Dim headerFields As Variant
-        headerFields = Split(csvHeader, ",")
-        If UBound(headerFields) + 1 <> expectedCount Then
-            MsgBox "CSV column count mismatch. Expected: " & expectedCount & ", Got: " & UBound(headerFields) + 1, vbExclamation
-            Exit Sub
-        End If
-    End If
+    ' === Step 2: Read CSV with Shift-JIS (using common function) ===
+    On Error GoTo ImportError
+    csvData = ReadCSVAs2DArrayStrict(filePath, 12, "shift_jis", False)
+    On Error GoTo 0
     
     ' === Clear all data rows before import ===
-    lastRow = wsTarget.Cells(wsTarget.rows.Count, "C").End(xlUp).Row
+    Dim lastRow As Long
+    lastRow = wsTarget.Cells(wsTarget.Rows.Count, "C").End(xlUp).Row
     If lastRow >= 7 Then
-        wsTarget.Range("A7:P" & lastRow).ClearContents
+        wsTarget.Range("A7:N" & lastRow).ClearContents
     End If
     
-    If UBound(lines) < 1 Then
+    If UBound(csvData, 1) < 1 Then
         MsgBox "No data in CSV.", vbExclamation
         Exit Sub
     End If
     
-    ' === Step 3: Collect CSV codes and data ===
-    Dim csvData As Object
-    Set csvData = CreateObject("Scripting.Dictionary")
-    
-    For i = 1 To UBound(lines)
-        If Trim(lines(i)) = "" Then GoTo NextCsvLine
-        dataArray = Split(lines(i), ",")
-        If UBound(dataArray) >= 0 Then
-            code = CleanCSVField(CStr(dataArray(0)))
-            If code <> "" Then
-                ' Use unique key: code + "_" + row index to avoid duplicate key error
-                csvData.Add code & "_" & i, dataArray
-            End If
-        End If
-NextCsvLine:
-    Next i
-    
-    If csvData.Count = 0 Then
-        MsgBox "No valid code found.", vbExclamation
-        Exit Sub
-    End If
-    
-    ' === Step 6: Write CSV data to next available row ===
+    ' === Step 3: Write CSV data to worksheet (forward order) ===
     writeRow = 7
     
-    For i = 1 To UBound(lines)
-        If Trim(lines(i)) = "" Then GoTo NextLine
+    For i = LBound(csvData, 1) To UBound(csvData, 1)
+        ' CSV col 1-12 -> C-N column
+        Dim j As Long
+        For j = 1 To 12
+            wsTarget.Cells(writeRow, j + 2).Value = CleanCSVField(CStr(csvData(i, j)))
+        Next j
         
-        dataArray = Split(lines(i), ",")
-        
-        ' CSV col 1 -> C column
-        code = CleanCSVField(CStr(dataArray(0)))
-        wsTarget.Cells(writeRow, 3).Value = code
-        
-        ' CSV col 2-11 -> G-P column
-        If UBound(dataArray) >= 1 Then wsTarget.Cells(writeRow, 9).Value = CleanCSVField(CStr(dataArray(1)))
-        If UBound(dataArray) >= 2 Then wsTarget.Cells(writeRow, 10).Value = CleanCSVField(CStr(dataArray(2)))
-        If UBound(dataArray) >= 3 Then wsTarget.Cells(writeRow, 11).Value = CleanCSVField(CStr(dataArray(3)))
-        If UBound(dataArray) >= 4 Then wsTarget.Cells(writeRow, 12).Value = CleanCSVField(CStr(dataArray(4)))
-        If UBound(dataArray) >= 5 Then wsTarget.Cells(writeRow, 13).Value = CleanCSVField(CStr(dataArray(5)))
-        If UBound(dataArray) >= 6 Then wsTarget.Cells(writeRow, 14).Value = CleanCSVField(CStr(dataArray(6)))
-        If UBound(dataArray) >= 7 Then wsTarget.Cells(writeRow, 15).Value = CleanCSVField(CStr(dataArray(7)))
-        If UBound(dataArray) >= 8 Then wsTarget.Cells(writeRow, 16).Value = CleanCSVField(CStr(dataArray(8)))
-        If UBound(dataArray) >= 9 Then wsTarget.Cells(writeRow, 17).Value = CleanCSVField(CStr(dataArray(9)))
-        If UBound(dataArray) >= 10 Then wsTarget.Cells(writeRow, 18).Value = CleanCSVField(CStr(dataArray(10)))
-        
-        ' Auto-fill D, E columns
-        Call FillFromKukanMaster(wsTarget, writeRow, False)
-        
-        ' G column has value → trigger F dropdown
-
-        
-        writeRow = writeRow + 1
-NextLine:
+        ' Auto-fill D, E columns from Z1
+        ' Call FillFromZ1(wsTarget, writeRow, False)
+         
+        writeRow = writeRow + 
     Next i
     
     MsgBox writeRow - 7 & " rows imported.", vbInformation
+    Exit Sub
+
+ImportError:
+    MsgBox "CSV import failed: " & Err.Description, vbExclamation
 End Sub
 
-Sub validate(ByVal ws As Worksheet, ByVal rowNum As Long)
+Sub validate(ByVal rowNum As Long)
+    Set ws = Me
+
     ' Check C column not empty
     If Trim(ws.Cells(rowNum, 3).Value) = "" Then
         ws.Cells(rowNum, 19).ClearContents
         Exit Sub
     End If
     
-    ' Check G, H required and numeric (for composite key)
+    ' Check G (column 9), H (column 10) required and numeric (for composite key)
     If Trim(ws.Cells(rowNum, 9).Value) = "" Or Not IsNumeric(ws.Cells(rowNum, 9).Value) Then
         ws.Cells(rowNum, 19).Value = "G column (I) is required and must be numeric"
         Exit Sub
@@ -194,13 +148,13 @@ Sub validate(ByVal ws As Worksheet, ByVal rowNum As Long)
         Exit Sub
     End If
     
-    ' Check I (K column) required
+    ' Check I (column 11) required
     If Trim(ws.Cells(rowNum, 11).Value) = "" Then
         ws.Cells(rowNum, 19).Value = "I column (K) is required"
         Exit Sub
     End If
     
-    ' Check J, K required and numeric
+    ' Check J (column 12), K (column 13) required and numeric
     If Trim(ws.Cells(rowNum, 12).Value) = "" Or Not IsNumeric(ws.Cells(rowNum, 12).Value) Then
         ws.Cells(rowNum, 19).Value = "J column (L) is required and must be numeric"
         Exit Sub
@@ -211,7 +165,7 @@ Sub validate(ByVal ws As Worksheet, ByVal rowNum As Long)
         Exit Sub
     End If
     
-    ' Check L-P optional but must be numeric if entered
+    ' Check L-P (columns 14-18) optional but must be numeric if entered
     Dim col As Long
     Dim colName As String
     Dim colLetter As String
@@ -225,7 +179,7 @@ Sub validate(ByVal ws As Worksheet, ByVal rowNum As Long)
         End If
     Next col
     
-    ' Check GH composite key duplicate
+    ' Check G-H composite key for duplicates
     Dim g As String, h As String
     Dim r As Long
     Dim lastRow As Long
@@ -233,7 +187,7 @@ Sub validate(ByVal ws As Worksheet, ByVal rowNum As Long)
     g = Trim(ws.Cells(rowNum, 9).Value)
     h = Trim(ws.Cells(rowNum, 10).Value)
     
-    lastRow = ws.Cells(ws.rows.Count, 3).End(xlUp).Row
+    lastRow = ws.Cells(ws.Rows.Count, 3).End(xlUp).Row
     
     For r = 7 To lastRow
         If r <> rowNum And Trim(ws.Cells(r, 3).Value) = Trim(ws.Cells(rowNum, 3).Value) Then
@@ -244,20 +198,19 @@ Sub validate(ByVal ws As Worksheet, ByVal rowNum As Long)
         End If
     Next r
     
-    ' Validation passed
+    ' Validation passed - clear error
     ws.Cells(rowNum, 19).ClearContents
 End Sub
 
 
-' Button macro (Validate selected row)
 Sub validateButton()
     Dim ws As Worksheet
     Dim lastRow As Long
     Dim r As Long
     Dim errorCount As Long
     
-    Set ws = ActiveSheet
-    lastRow = ws.Cells(ws.rows.Count, "C").End(xlUp).Row
+    Set ws = Me
+    lastRow = ws.Cells(ws.Rows.Count, "C").End(xlUp).Row
     
     If lastRow < 7 Then
         MsgBox "No data found.", vbExclamation
@@ -266,81 +219,110 @@ Sub validateButton()
     
     errorCount = 0
     For r = 7 To lastRow
-        Call validateDetailData(ws, r)
-        If Trim(ws.Cells(r, 17).Value) <> "" Then
+        Call validate(ws, r)
+        If Trim(ws.Cells(r, 19).Value) <> "" Then
             errorCount = errorCount + 1
         End If
     Next r
     
-    MsgBox "Validation complete. Errors: " & errorCount & ", ", vbInformation
+    MsgBox "Validation complete. Errors: " & errorCount, vbInformation
 End Sub
 
 Sub M1_Export()
-    Dim ws As Worksheet
-    Set ws = ActiveSheet
-    
-    Dim lastDataRow As Long
-    lastDataRow = ws.Cells(ws.rows.Count, "C").End(xlUp).Row
-    
+    Dim lastDataRow As Long: lastDataRow = GetLastDataRowInRange(Me, START_COL, END_COL)
     If lastDataRow < 7 Then
         MsgBox "No data rows to output.", vbExclamation
         Exit Sub
     End If
+
+    Dim ws As Worksheet
+    Set ws = Me
     
-    Dim savePath As String
-    savePath = Application.GetSaveAsFilename( _
-        FileFilter:="CSV Files (*.csv), *.csv", _
-        Title:="Save CSV")
-    
-    If savePath = "False" Then Exit Sub
-    If InStr(1, savePath, ".csv", vbTextCompare) = 0 Then
-        savePath = savePath & ".csv"
-    End If
-    
-    ' Build header from row 5 (columns C, G-P)
-    Dim csvContent As String
-    csvContent = Trim(ws.Cells(5, 3).Value)
-    Dim j As Long
-    For j = 7 To 16
-        csvContent = csvContent & "," & Trim(ws.Cells(5, j).Value)
-    Next j
-    csvContent = csvContent & vbLf
-    
-    ' Row counter
-    Dim rowCount As Long
-    rowCount = 0
-    
-    ' Data: C,G,H,I,J,K,L,M,N,O,P (skip D,E,F)
-    Dim r As Long
+    ' === Step 1: Validate all rows before export ===
+    Dim r As Long, errorCount As Long
     For r = 7 To lastDataRow
         If Len(Trim(ws.Cells(r, 3).Value & "")) > 0 Then
-            rowCount = rowCount + 1
-            ' CSV col1 -> C column
-            csvContent = csvContent & CleanCSVField(ws.Cells(r, 3).Value)
-            ' CSV col2-11 -> I-R column
-            For j = 9 To 18
-                csvContent = csvContent & "," & CleanCSVField(ws.Cells(r, j).Value)
-            Next j
-            csvContent = csvContent & vbLf
+            Call validate(ws, r)
+            If Trim(ws.Cells(r, 19).Value) <> "" Then
+                errorCount = errorCount + 1
+            End If
         End If
     Next r
     
-    ' Trim trailing empty lines
-    Do While Right(csvContent, 1) = vbLf
-        csvContent = Left(csvContent, Len(csvContent) - 1)
-    Loop
+    If errorCount > 0 Then
+        MsgBox "Validation failed. Found " & errorCount & " error(s). Please correct them before exporting.", vbCritical
+        Exit Sub
+    End If
     
-    ' Write file
-    Dim stream As Object
-    Set stream = CreateObject("ADODB.Stream")
-    stream.Type = 2
-    stream.Charset = "shift_jis"
-    stream.Open
-    stream.WriteText csvContent, 1
-    stream.SaveToFile savePath, 2
-    stream.Close
+    ' === Step 2: Select save path ===
+    Dim savePath As String
+    savePath = GetSaveCSVPath()
+    If savePath = "" Then Exit Sub
+    
+    ' === Step 3: Get header from row 5 (C-N columns) ===
+    Dim headerArr As Variant
+    headerArr = GetM1CSVHeader(ws)
+    
+    ' === Step 4: Build data array (skip D, E, F columns) ===
+    Dim dataArr As Variant
+    Dim rowCount As Long
+    rowCount = 0
+    
+    For r = 7 To lastDataRow
+        If Len(Trim(ws.Cells(r, 3).Value & "")) > 0 Then
+            rowCount = rowCount + 1
+        End If
+    Next r
+    
+    If rowCount = 0 Then
+        MsgBox "No data rows to output.", vbExclamation
+        Exit Sub
+    End If
+    
+    ReDim dataArr(1 To rowCount, 1 To 12)
+    
+    Dim dataRow As Long
+    dataRow = 0
+    For r = 7 To lastDataRow
+        If Len(Trim(ws.Cells(r, 3).Value & "")) > 0 Then
+            dataRow = dataRow + 1
+            ' CSV col1 -> C column
+            dataArr(dataRow, 1) = CleanCSVField(ws.Cells(r, 3).Value)
+            ' CSV col2-12 -> G-N column (columns 7-14)
+            Dim j As Long
+            For j = 7 To 14
+                dataArr(dataRow, j - 6) = CleanCSVField(ws.Cells(r, j).Value)
+            Next j
+        End If
+    Next r
+    
+    ' === Step 5: Write to CSV (using common function) ===
+    Dim outputArr As Variant
+    ReDim outputArr(1 To rowCount + 1, 1 To 12)
+    
+    ' Copy header to first row
+    Dim colIdx As Long
+    For colIdx = 1 To 12
+        outputArr(1, colIdx) = headerArr(1, colIdx)
+    Next colIdx
+    
+    ' Copy data to remaining rows
+    Dim dataR As Long
+    For dataR = 1 To rowCount
+        For colIdx = 1 To 12
+            outputArr(dataR + 1, colIdx) = dataArr(dataR, colIdx)
+        Next colIdx
+    Next dataR
+    
+    On Error GoTo ExportError
+    Call WriteCSVFromArray(savePath, outputArr, "shift_jis", False)
+    On Error GoTo 0
     
     MsgBox "CSV export completed. Total data rows: " & rowCount, vbInformation
+    Exit Sub
+
+ExportError:
+    MsgBox "CSV export failed: " & Err.Description, vbExclamation
 End Sub
 
 Sub M1_SortDataRowsByC()
diff --git a/src/thisWorkbook/Master_Z1_222.bas b/src/thisWorkbook/Master_Z1_222.bas
index b467aa6..15ac97a 100644
--- a/src/thisWorkbook/Master_Z1_222.bas
+++ b/src/thisWorkbook/Master_Z1_222.bas
@@ -1,4 +1,10 @@
 ' ====== (222) =======
+
+' ====== Constants ======
+Const START_COL As Long = 3
+Const END_COL As Long = 9
+
+' ====== Function ======
 Sub Z1_ClearRowData(ByVal ws As Worksheet, ByVal rowNum As Long)
     Call Generic_Master_ClearRowData(ws, rowNum)
 End Sub
@@ -8,15 +14,14 @@ Sub Z1_Import()
 End Sub
 
 Sub Z1_Export()
-    Dim lastDataRow As Long: lastDataRow = GetLastDataRow(Me, 3)
+    Dim lastDataRow As Long: lastDataRow = GetLastDataRowInRange(Me, START_COL, END_COL)
     
     If lastDataRow < 7 Then
         MsgBox "No data rows to output.", vbExclamation
         Exit Sub
     End If
     
-    Dim r As Long
-    Dim errorCount As Long
+    Dim r As Long, errorCount As Long
     For r = 7 To lastDataRow
         Validate r
         If Trim(Cells(r, 2).Value & "") <> "" Then
@@ -33,14 +38,12 @@ Sub Z1_Export()
 End Sub
 
 Sub Validate(ByVal rowNum As Long)
-    Dim cValue As String
     Set ws = Me
-
-    cValue = Trim(ws.Cells(rowNum, 3).Value)
+    Dim cValue As String: cValue = Trim(ws.Cells(rowNum, 3).Value)
 
     ' clear C~I columns background color
     Dim clearRange As Range
-    Set clearRange = ws.Range(ws.Cells(rowNum, 3), ws.Cells(rowNum, 9))
+    Set clearRange = ws.Range(ws.Cells(rowNum, START_COL), ws.Cells(rowNum, END_COL))
     clearRange.Interior.Color = vbWhite
     
     If cValue = "" Then
@@ -135,19 +138,16 @@ Sub Validate(ByVal rowNum As Long)
 End Sub
 
 Sub Z1_validateButton()
-    Dim lastRow As Long
-    Dim r As Long
-    Dim errorCount As Long
+    Dim lastDataRow As Long, r As Long, errorCount As Long
+    lastDataRow = GetLastDataRowInRange(Me, START_COL, END_COL)
     
-    lastRow = GetLastDataRow(Me, 3)
-    
-    If lastRow < 7 Then
+    If lastDataRow < 7 Then
         MsgBox "No data found.", vbExclamation
         Exit Sub
     End If
     
     errorCount = 0
-    For r = 7 To lastRow
+    For r = 7 To lastDataRow
         Validate r
         If Trim(Cells(r, 2).Value) <> "" Then
             errorCount = errorCount + 1
@@ -166,5 +166,5 @@ Sub Z1_ToggleAutoFilter()
 End Sub
 
 Sub Z1_AutoFitColumnWidth()
-    Call AutoFitColumnWidth(2, 9)
+    Call AutoFitColumnWidth(2, END_COL)
 End Sub
\ No newline at end of file
diff --git a/src/thisWorkbook/Master_Z2_223.bas b/src/thisWorkbook/Master_Z2_223.bas
index 12bbeb3..c58f314 100644
--- a/src/thisWorkbook/Master_Z2_223.bas
+++ b/src/thisWorkbook/Master_Z2_223.bas
@@ -1,4 +1,10 @@
 ' ====== (223) =======
+
+' ====== Constants ======
+Const START_COL As Long = 3
+Const END_COL As Long = 7
+
+' ====== Function ======
 Sub Z2_ClearRowData(ByVal ws As Worksheet, ByVal rowNum As Long)
     Call Generic_Master_ClearRowData(ws, rowNum)
 End Sub
@@ -8,15 +14,14 @@ Sub Z2_Import()
 End Sub
 
 Sub Z2_Export()
-    Dim lastDataRow As Long: lastDataRow = GetLastDataRow(Me, 3)
+    Dim lastDataRow As Long: lastDataRow = GetLastDataRowInRange(Me, START_COL, END_COL)
     
     If lastDataRow < 7 Then
         MsgBox "No data rows to output.", vbExclamation
         Exit Sub
     End If
     
-    Dim r As Long
-    Dim errorCount As Long
+    Dim r As Long, errorCount As Long
     For r = 7 To lastDataRow
         Validate r
         If Trim(Cells(r, 2).Value & "") <> "" Then
@@ -33,14 +38,12 @@ Sub Z2_Export()
 End Sub
 
 Sub Validate(ByVal rowNum As Long)
-    Dim cValue As String
     Set ws = Me
-
-    cValue = Trim(ws.Cells(rowNum, 3).Value)
+    Dim cValue As String: cValue = Trim(ws.Cells(rowNum, 3).Value)
 
     ' clear C~I columns background color
     Dim clearRange As Range
-    Set clearRange = ws.Range(ws.Cells(rowNum, 3), ws.Cells(rowNum, 7))
+    Set clearRange = ws.Range(ws.Cells(rowNum, START_COL), ws.Cells(rowNum, END_COL))
     clearRange.Interior.Color = vbWhite
     
     If cValue = "" Then
@@ -119,19 +122,16 @@ Sub Validate(ByVal rowNum As Long)
 End Sub
 
 Sub Z2_validateButton()
-    Dim lastRow As Long
-    Dim r As Long
-    Dim errorCount As Long
+    Dim lastDataRow As Long, r As Long, errorCount As Long
+    lastDataRow = GetLastDataRowInRange(Me, START_COL, END_COL)
     
-    lastRow = GetLastDataRow(Me, 3)
-    
-    If lastRow < 7 Then
+    If lastDataRow < 7 Then
         MsgBox "No data found.", vbExclamation
         Exit Sub
     End If
     
     errorCount = 0
-    For r = 7 To lastRow
+    For r = 7 To lastDataRow
         Validate r
         If Trim(Cells(r, 2).Value) <> "" Then
             errorCount = errorCount + 1
@@ -150,5 +150,5 @@ Sub Z2_ToggleAutoFilter()
 End Sub
 
 Sub Z2_AutoFitColumnWidth()
-    Call AutoFitColumnWidth(2, 7)
+    Call AutoFitColumnWidth(2, END_COL)
 End Sub
\ No newline at end of file
diff --git a/src/thisWorkbook/Master_Z3_224.bas b/src/thisWorkbook/Master_Z3_224.bas
index 9af102a..8fc4847 100644
--- a/src/thisWorkbook/Master_Z3_224.bas
+++ b/src/thisWorkbook/Master_Z3_224.bas
@@ -1,4 +1,10 @@
 ' ====== (224) =======
+
+' ====== Constants ======
+Const START_COL As Long = 3
+Const END_COL As Long = 8
+
+' ====== Function ======
 Sub Z3_ClearRowData(ByVal ws As Worksheet, ByVal rowNum As Long)
     Call Generic_Master_ClearRowData(ws, rowNum)
 End Sub
@@ -8,15 +14,14 @@ Sub Z3_Import()
 End Sub
 
 Sub Z3_Export()
-    Dim lastDataRow As Long: lastDataRow = GetLastDataRow(Me, 3)
+    Dim lastDataRow As Long: lastDataRow = GetLastDataRowInRange(Me, START_COL, END_COL)
     
     If lastDataRow < 7 Then
         MsgBox "No data rows to output.", vbExclamation
         Exit Sub
     End If
     
-    Dim r As Long
-    Dim errorCount As Long
+    Dim r As Long, errorCount As Long
     For r = 7 To lastDataRow
         Validate r
         If Trim(Cells(r, 2).Value & "") <> "" Then
@@ -33,14 +38,12 @@ Sub Z3_Export()
 End Sub
 
 Sub Validate(ByVal rowNum As Long)
-    Dim cValue As String
     Set ws = Me
-
-    cValue = Trim(ws.Cells(rowNum, 3).Value)
+    Dim cValue As String: cValue = Trim(ws.Cells(rowNum, 3).Value)
 
     ' clear C~I columns background color
     Dim clearRange As Range
-    Set clearRange = ws.Range(ws.Cells(rowNum, 3), ws.Cells(rowNum, 8))
+    Set clearRange = ws.Range(ws.Cells(rowNum, START_COL), ws.Cells(rowNum, END_COL))
     clearRange.Interior.Color = vbWhite
     
     If cValue = "" Then
@@ -127,19 +130,16 @@ Sub Validate(ByVal rowNum As Long)
 End Sub
 
 Sub Z3_validateButton()
-    Dim lastRow As Long
-    Dim r As Long
-    Dim errorCount As Long
-    
-    lastRow = GetLastDataRow(Me, 3)
-    
-    If lastRow < 7 Then
+    Dim lastDataRow As Long, r As Long, errorCount As Long
+    lastDataRow = GetLastDataRowInRange(Me, START_COL, END_COL)
+
+    If lastDataRow < 7 Then
         MsgBox "No data found.", vbExclamation
         Exit Sub
     End If
     
     errorCount = 0
-    For r = 7 To lastRow
+    For r = 7 To lastDataRow
         Validate r
         If Trim(Cells(r, 2).Value) <> "" Then
             errorCount = errorCount + 1
@@ -158,5 +158,5 @@ Sub Z3_ToggleAutoFilter()
 End Sub
 
 Sub Z3_AutoFitColumnWidth()
-    Call AutoFitColumnWidth(2, 8)
+    Call AutoFitColumnWidth(2, END_COL)
 End Sub
\ No newline at end of file
diff --git a/通勤手当テンプレート_案.xlsm b/通勤手当テンプレート_案.xlsm
index efb9d88..5d0ca6d 100644
Binary files a/通勤手当テンプレート_案.xlsm and b/通勤手当テンプレート_案.xlsm differ