diff --git a/src/module/Common_Functions.bas b/src/module/Common_Functions.bas
index f952e66..f49fbf7 100644
--- a/src/module/Common_Functions.bas
+++ b/src/module/Common_Functions.bas
@@ -428,3 +428,32 @@ Function Check12(ByVal ws As Worksheet, ByVal rowNum As Long, ByVal colNum As Lo
     End If
     Check12 = True
 End Function
+
+Function CheckDuplicate(ByVal ws As Worksheet, ByVal rowNum As Long, ByVal colNum As Long, ByVal errorCol As String) As Boolean
+    Dim checkValue As String: checkValue = Trim(ws.Cells(rowNum, colNum).Value)
+    Dim letter As String: letter = ColLetter(colNum)
+    Dim i As Long
+    
+    For i = 7 To rowNum - 1
+        If Trim(ws.Cells(i, colNum).Value) = checkValue Then
+            ws.Cells(rowNum, errorCol).Value = GetErrorMsg("E010", letter & rowNum, checkValue)
+            ws.Cells(rowNum, colNum).Interior.Color = RGB(255, 0, 0)
+            CheckDuplicate = False
+            Exit Function
+        End If
+    Next i
+    
+    CheckDuplicate = True
+End Function
+
+Function CheckNumber(ByVal ws As Worksheet, ByVal rowNum As Long, ByVal colNum As Long, ByVal varcharLength As Long, ByVal errorCol As String)
+    Dim checkValue As String: checkValue = Trim(ws.Cells(rowNum, colNum).Value)
+    If Len(checkValue) > varcharLength Then
+        Dim letter As String: letter = ColLetter(colNum)
+        ws.Cells(rowNum, errorCol).Value = GetErrorMsg("E011", letter & rowNum)
+        ws.Cells(rowNum, colNum).Interior.Color = RGB(255, 0, 0)
+        CheckVarcharOver = False
+        Exit Function
+    End If
+    CheckVarcharOver = True
+End Function
diff --git a/src/sheet/M2.cls b/src/sheet/M2.cls
index 7d6960c..7825bfb 100644
--- a/src/sheet/M2.cls
+++ b/src/sheet/M2.cls
@@ -21,7 +21,7 @@ Private Sub Worksheet_Change(ByVal Target As Range)
     End If
 End Sub
 
-Private Sub FillFromM1(ByVal rowNum As Long, Optional ByVal setG As Boolean = True)
+Private Sub FillFromM1(ByVal rowNum As Long)
     Set ws = Me
     
     Dim m1Cache As Object: Set m1Cache = GetM1Cache()
@@ -36,15 +36,18 @@ Private Sub FillFromM1(ByVal rowNum As Long, Optional ByVal setG As Boolean = Tr
 
     ' Check C column in the cache
     If Not m1Cache.Exists(cValue) Then
-        ws.Cells(rowNum, ERROR_COL).Value = "C column does not exist in M1."
-        ws.Range("C" & rowNum).Interior.Color = RGB(255, 0, 0)
+        ws.Cells(rowNum, 4).Value = ""
+        ws.Cells(rowNum, 5).Value = ""
+        ws.Cells(rowNum, 6).Value = ""
+        ws.Cells(rowNum, 7).Value = ""
+        ws.Cells(rowNum, 8).Value = ""
         Exit Sub
     End If
 
     Dim cacheVal As Variant: cacheVal = m1Cache(cValue)
     
     ' D column = cache[1]: cache[2]
-    ws.Cells(rowNum, 4).Value = Trim(cacheVal(1)) & ": " & Trim(cacheVal(2))
+    ws.Cells(rowNum, 4).Value = Trim(cacheVal(1)) & ":" & Trim(cacheVal(2))
     ' E column = cache[3]
     ws.Cells(rowNum, 5).Value = Trim(cacheVal(3))
     ' F column = cache[4]
@@ -76,19 +79,23 @@ Public Sub Validate(ws As Worksheet, ByVal rowNum As Long, ByVal lastDataRow As
 
     ' Check C column in the cache
     Dim m1Cache As Object: Set m1Cache = GetM1Cache()
-    Dim cValue As String: cValue = Trim(ws.Range("C" & rowNum).Value)
 
-    If cValue <> "" AND Not m1Cache.Exists(cValue) Then
-        ws.Cells(rowNum, errorCol).Value = "C column does not exist in M1."
+    ' C column check
+    checkResult = CheckRequired(ws, rowNum, 3, errorCol)
+    If checkResult = False Then Exit Sub
+
+    Dim cValue As String: cValue = Trim(ws.Range("C" & rowNum).Value)
+    If Not m1Cache.Exists(cValue) Then
+        ws.Cells(rowNum, errorCol).Value = GetErrorMsg("E004", "C" & rowNum)
         ws.Range("C" & rowNum).Interior.Color = RGB(255, 0, 0)
         Exit Sub
     End If
 
     ' Check column required
     Dim colLetter As Variant
-    For Each colLetter In Array("C", "I", "J", "K")
+    For Each colLetter In Array("I", "J", "K")
         If Trim(ws.Range(colLetter & rowNum).Value) = "" Then
-            ws.Cells(rowNum, errorCol).Value = colLetter & " column is required"
+            ws.Cells(rowNum, errorCol).Value = GetErrorMsg("E002", colLetter & rowNum)
             ws.Range(colLetter & rowNum).Interior.Color = RGB(255, 0, 0)
             Exit Sub
         End If
@@ -100,19 +107,24 @@ Public Sub Validate(ws As Worksheet, ByVal rowNum As Long, ByVal lastDataRow As
     For Each col In numericCols
         Dim val As String: val = Trim(ws.Range(col & rowNum).Value & "")
         If val <> "" And Not IsNumeric(val) Then
-            ws.Cells(rowNum, errorCol).Value = col & " column must be numeric"
+            ws.Cells(rowNum, errorCol).Value = GetErrorMsg("E011", col & rowNum)
             ws.Range(col & rowNum).Interior.Color = RGB(255, 0, 0)
             Exit Sub
         End If
     Next col
 
     ' Check I column in the kenshuKbn
-    Dim kenshuKbn As Variant: kenshuKbn = Array("1", "2", "3")
-    Dim iValue As String: iValue = Trim(ws.Range("I" & rowNum).Value)
-    If UBound(Filter(kenshuKbn, iValue)) = -1 Then
-        ws.Cells(rowNum, errorCol).Value = "I column (kenshuKbn) must be 1, 2, or 3"
+    Dim kenshuList As Object: Set kenshuList = GetKenshuList()
+    Dim kenshuKbn As String: kenshuKbn = Trim(ws.Range("I" & rowNum).Value)
+    If Not kenshuList.Exists(kenshuKbn) Then
+        ws.Cells(rowNum, errorCol).Value = GetErrorMsg("E012", "I" & rowNum)
         ws.Range("I" & rowNum).Interior.Color = RGB(255, 0, 0)
         Exit Sub
     End If
 
+    ws.Cells(rowNum, errorCol).ClearContents
+
+End Sub
+
+Sub ImportCSVAndTriggerChange(ws As Worksheet)
 End Sub
diff --git a/src/sheet/Z1.cls b/src/sheet/Z1.cls
index 0e44d15..8ba642f 100644
--- a/src/sheet/Z1.cls
+++ b/src/sheet/Z1.cls
@@ -30,6 +30,9 @@ Public Sub Validate(ws As Worksheet, ByVal rowNum As Long, ByVal lastDataRow As
     checkResult = CheckAlphanumeric(ws, rowNum, 3, 3, errorCol)
     If checkResult = False Then Exit Sub
     
+    checkResult = CheckDuplicate(ws, rowNum, 3, errorCol)
+    If checkResult = False Then Exit Sub
+    
     ' D column check
     checkResult = CheckRequired(ws, rowNum, 4, errorCol)
     If checkResult = False Then Exit Sub
diff --git a/src/sheet/Z2.cls b/src/sheet/Z2.cls
index a3ffab0..e09f2a0 100644
--- a/src/sheet/Z2.cls
+++ b/src/sheet/Z2.cls
@@ -27,6 +27,9 @@ Public Sub Validate(ws As Worksheet, ByVal rowNum As Long, ByVal lastDataRow As
 
     checkResult = CheckAlphanumeric(ws, rowNum, 3, 1, errorCol)
     If checkResult = False Then Exit Sub
+
+    checkResult = CheckDuplicate(ws, rowNum, 3, errorCol)
+    If checkResult = False Then Exit Sub
     
     ' D column check
     checkResult = CheckRequired(ws, rowNum, 4, errorCol)
diff --git a/src/sheet/Z3.cls b/src/sheet/Z3.cls
index e58699f..2e7abee 100644
--- a/src/sheet/Z3.cls
+++ b/src/sheet/Z3.cls
@@ -26,6 +26,9 @@ Public Sub Validate(ws As Worksheet, ByVal rowNum As Long, ByVal lastDataRow As
 
     checkResult = CheckAlphanumeric(ws, rowNum, 3, 2, errorCol)
     If checkResult = False Then Exit Sub
+
+    checkResult = CheckDuplicate(ws, rowNum, 3, errorCol)
+    If checkResult = False Then Exit Sub
     
     ' D column check
     checkResult = CheckRequired(ws, rowNum, 4, errorCol)
diff --git a/src/sheet/Z4.cls b/src/sheet/Z4.cls
index 16b122b..7510867 100644
--- a/src/sheet/Z4.cls
+++ b/src/sheet/Z4.cls
@@ -26,6 +26,9 @@ Public Sub Validate(ws As Worksheet, ByVal rowNum As Long, ByVal lastDataRow As
 
     checkResult = CheckAlphanumeric(ws, rowNum, 3, 2, errorCol)
     If checkResult = False Then Exit Sub
+
+    checkResult = CheckDuplicate(ws, rowNum, 3, errorCol)
+    If checkResult = False Then Exit Sub
     
     ' D column check
     checkResult = CheckRequired(ws, rowNum, 4, errorCol)
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 0ce4a22..702c33f 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