diff --git a/src/module/Common_Button.bas b/src/module/Common_Button.bas
index 72c17f6..32a6f07 100644
--- a/src/module/Common_Button.bas
+++ b/src/module/Common_Button.bas
@@ -31,7 +31,10 @@ Sub Fit_Button()
 End Sub
 
 Sub RefreshCache_Button()
-    ' 重新加载所有缓存
+    Dim result As Boolean: result = RefreshCache()
+    If result = True Then
+        MsgBox "master data reload successfully."
+    End If
 End Sub
 
 Private Sub DO_CSV_Import(ws As Excel.Worksheet)
@@ -205,7 +208,7 @@ ExportError:
 End Sub
 
 Private Sub Do_Sort(ws As Excel.Worksheet)
-    MsgBox "1"
+    '
 End Sub
 
 Private Sub Do_Filter(ws As Excel.Worksheet)
diff --git a/src/module/Common_Global_Cache.bas b/src/module/Common_Global_Cache.bas
index 84f8207..b9c3c17 100644
--- a/src/module/Common_Global_Cache.bas
+++ b/src/module/Common_Global_Cache.bas
@@ -249,10 +249,10 @@ Private Sub RefreshO1Cache()
     
     Dim lastRow As Long
     lastRow = wsO1.Cells(wsO1.Rows.Count, 3).End(xlUp).Row
-    If lastRow < 7 Then Exit Sub
+    If lastRow < 6 Then Exit Sub
     
     Dim r As Long
-    For r = 7 To lastRow
+    For r = 6 To lastRow
         Dim cVal As String
         cVal = Trim(wsO1.Cells(r, 3).Value)  ' C column
         Dim eVal As String
@@ -293,7 +293,7 @@ Private Sub RefreshO2Cache()
     Set o2Cache = Nothing
     
     On Error GoTo RefreshError
-    Set o2Cache = LoadLookup("O2", keyCol:=3, valueCols:=Array(4), startRow:=7)
+    Set o2Cache = LoadLookup("O2", keyCol:=3, valueCols:=Array(4), startRow:=6)
     On Error GoTo 0
 
     If o2Cache Is Nothing Or o2Cache.Count = 0 Then
@@ -636,4 +636,22 @@ End Function
 Public Function GetKenshuList() As Object
     If kenshuList Is Nothing Then Call RefreshKenshuList
     Set GetKenshuList = kenshuList
+End Function
+
+Public Function RefreshCache() As Boolean
+    Call RefreshM1Cache
+    Call RefreshM1KukanDCache
+    Call RefreshM2Cache
+    Call RefreshZ1Cache
+    Call RefreshZ2Cache
+    Call RefreshZ3Cache
+    Call RefreshZ4Cache
+    Call RefreshO1Cache
+    Call RefreshO2Cache
+    Call RefreshTokubetu
+    Call RefreshOufukuList
+    Call RefreshKoutaiList
+    Call RefreshHigaitouList
+    Call RefreshKenshuList
+    RefreshCache = True
 End Function
\ No newline at end of file
diff --git a/src/sheet/M1.cls b/src/sheet/M1.cls
index f96cad7..075ff7f 100644
--- a/src/sheet/M1.cls
+++ b/src/sheet/M1.cls
@@ -152,6 +152,14 @@ Private Sub Validate(ws As Worksheet, ByVal rowNum As Long, ByVal lastDataRow As
         Exit Sub
     End If
 
+    ' Check if M2 uses this M1 kukan code
+    Dim m2Cache As Object: Set m2Cache = GetM2Cache()
+    If Not m2Cache.Exists(cValue) Then
+        ws.Cells(rowNum, errorCol).Value = "The section details are not registered for the corresponding section"
+        ws.Range("C" & rowNum).Interior.Color = RGB(255, 128, 0)
+        Exit Sub
+    End If
+
     ' Validation passed - clear error
     ws.Cells(rowNum, errorCol).ClearContents
 End Sub
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 1b802eb..ae3052d 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