diff --git a/vba_code_kukan_detail_master.txt b/vba_code_kukan_detail_master.txt
index f7803ee..c96076c 100644
--- a/vba_code_kukan_detail_master.txt
+++ b/vba_code_kukan_detail_master.txt
@@ -38,7 +38,19 @@ Sub FillFromKukanMaster(ByVal ws As Worksheet, ByVal rowNum As Long, Optional By
     Dim code As String
     
     On Error Resume Next
-    Set wsKukan = ThisWorkbook.Worksheets("区間メンテナンス")
+    ' Try to find worksheet with partial match
+    Dim wsName As String
+    wsName = "区間メンテナンス"
+    Set wsKukan = Nothing
+    Dim s As Worksheet
+    For Each s In ThisWorkbook.Worksheets
+        If InStr(1, s.Name, "区間", vbTextCompare) > 0 Then
+            Set wsKukan = s
+            Exit For
+        End If
+    Next
+    If wsKukan Is Nothing Then Set wsKukan = ThisWorkbook.Worksheets(wsName)
+    
     If wsKukan Is Nothing Then
         Dim wsList As String
         Dim s As Worksheet