diff --git a/src/thisWorkbook/Tukin_C1.bas b/src/thisWorkbook/Tukin_C1.bas
index 1386b90..77f44ea 100644
--- a/src/thisWorkbook/Tukin_C1.bas
+++ b/src/thisWorkbook/Tukin_C1.bas
@@ -35,243 +35,125 @@ Const Tukin_HEADER_ROW As Long = 6
 ' AY-BA: 備考情報 (cols 51-53)
 ' BB-BC: 認定情報 (cols 54-56)
 
-' ====== Event Handlers ======
+' ============================================================
+' Column arrays for 4 kukan sections
+' ============================================================
+Private Function KUKAN_CODE_COLS() As Variant
+    KUKAN_CODE_COLS = Array(19, 26, 33, 40)  ' S, Z, AG, AN
+End Function
+
+Private Function KUKAN_TRANSPORT_COLS() As Variant
+    KUKAN_TRANSPORT_COLS = Array(20, 27, 34, 41)  ' T, AA, AH, AO
+End Function
+
+Private Function KUKAN_STATION_COLS() As Variant
+    KUKAN_STATION_COLS = Array(21, 28, 35, 42)  ' U, AB, AI, AP
+End Function
+
+Private Function KUKAN_ARRIVAL_COLS() As Variant
+    KUKAN_ARRIVAL_COLS = Array(22, 29, 36, 43)  ' V, AC, AJ, AQ
+End Function
+
+Private Function KUKAN_TICKET_COLS() As Variant
+    KUKAN_TICKET_COLS = Array(23, 30, 37, 44)  ' W, AD, AK, AR
+End Function
+
+Private Function KUKAN_CODE2_COLS() As Variant
+    KUKAN_CODE2_COLS = Array(24, 31, 38, 45)  ' X, AE, AL, AS
+End Function
+
+' ============================================================
+' Helper: Get index by value, return -1 if not found
+' ============================================================
+Private Function GetIdx(val As Long, arr As Variant) As Long
+    Dim i As Long
+    For i = LBound(arr) To UBound(arr)
+        If arr(i) = val Then
+            GetIdx = i
+            Exit Function
+        End If
+    Next i
+    GetIdx = -1
+End Function
+
+' ============================================================
+' Event Handlers
+' ============================================================
 Private Sub Worksheet_Change(ByVal Target As Range)
-    ' === Column C changes: Fill address info from O1 and Z1 cache ===
-    If Target.Column = 3 And Target.Row >= 7 Then
+    If Target.Row < 7 Then Exit Sub
+    
+    ' === Column C changes ===
+    If Target.Column = 3 Then
         Dim cell As Range
         For Each cell In Target
             If Trim(cell.Value) = "" Then
                 Call ClearRowData(Me, cell.Row)
             Else
                 Call FillAddressFromO1(cell.Row)
-                ' Generate transport (T) dropdown for all 4 kukan sections
-                Call CreateZ1TransportDropdown(Me, cell.Row, 20)   ' 区間1 - T column
-                Call CreateZ1TransportDropdown(Me, cell.Row, 30)   ' 区間2 - AD column
-                Call CreateZ1TransportDropdown(Me, cell.Row, 37)   ' 区間3 - AK column
-                Call CreateZ1TransportDropdown(Me, cell.Row, 44)   ' 区間4 - AR column
+                Dim i As Long
+                For i = 0 To 3
+                    Call CreateZ1TransportDropdown(Me, cell.Row, KUKAN_TRANSPORT_COLS(i))
+                Next i
             End If
         Next
     End If
     
-    ' === Column T (区間1 交通機関) changes: Generate U (利用区間発) dropdown from Z1 ===
-    If Target.Column = 20 And Target.Row >= 7 Then
+    ' === Transport column changes (T, AA, AH, AO) ===
+    Dim idx As Long
+    idx = GetIdx(Target.Column, KUKAN_TRANSPORT_COLS)
+    If idx >= 0 Then
         Dim cellT As Range
         For Each cellT In Target
             If Trim(cellT.Value) <> "" Then
-                Call CreateZ1StationDropdown(Me, cellT.Row, 20, 21, 1)
+                Call CreateZ1StationDropdown(Me, cellT.Row, KUKAN_TRANSPORT_COLS(idx), KUKAN_STATION_COLS(idx))
             Else
-                Call ClearKukanValidation(Me, cellT.Row, 21)
+                Call ClearKukanValidation(Me, cellT.Row, KUKAN_STATION_COLS(idx))
             End If
         Next
     End If
     
-    ' === Column U (区間1 利用区間発) changes: Generate V (利用区間着) dropdown from M1_KukanD ===
-    If Target.Column = 21 And Target.Row >= 7 Then
+    ' === Station column changes (U, AB, AI, AP) ===
+    idx = GetIdx(Target.Column, KUKAN_STATION_COLS)
+    If idx >= 0 Then
         Dim cellU As Range
         For Each cellU In Target
             If Trim(cellU.Value) <> "" Then
-                Call CreateM1KukanDDropdown(Me, cellU.Row, 20, 21, 22)
-                If Me.Cells(cellU.Row, 22).Validation.Formula1 = "" Then
-                    ' No dropdown data, clear V column
-                    Call ClearKukanValidation(Me, cellU.Row, 22)
+                Call CreateM1KukanDDropdown(Me, cellU.Row, KUKAN_TRANSPORT_COLS(idx), KUKAN_STATION_COLS(idx), KUKAN_ARRIVAL_COLS(idx))
+                If Me.Cells(cellU.Row, KUKAN_ARRIVAL_COLS(idx)).Validation.Formula1 = "" Then
+                    Call ClearKukanValidation(Me, cellU.Row, KUKAN_ARRIVAL_COLS(idx))
                 End If
             Else
-                Call ClearKukanValidation(Me, cellU.Row, 22)
+                Call ClearKukanValidation(Me, cellU.Row, KUKAN_ARRIVAL_COLS(idx))
             End If
         Next
     End If
     
-    ' === Column AD (区間2 交通機関) changes ===
-    If Target.Column = 30 And Target.Row >= 7 Then
-        Dim cellAD As Range
-        For Each cellAD In Target
-            If Trim(cellAD.Value) <> "" Then
-                Call CreateZ1StationDropdown(Me, cellAD.Row, 30, 31)
-            Else
-                Call ClearKukanValidation(Me, cellAD.Row, 31)
-            End If
-        Next
-    End If
-    
-    ' === Column AE (区間2 利用区間発) changes ===
-    If Target.Column = 31 And Target.Row >= 7 Then
-        Dim cellAE As Range
-        For Each cellAE In Target
-            If Trim(cellAE.Value) <> "" Then
-                Call CreateM1KukanDDropdown(Me, cellAE.Row, 30, 31, 32)
-                If Me.Cells(cellAE.Row, 32).Validation.Formula1 = "" Then
-                    Call ClearKukanValidation(Me, cellAE.Row, 32)
+    ' === Kukan code column changes (S, Z, AG, AN) ===
+    idx = GetIdx(Target.Column, KUKAN_CODE_COLS)
+    If idx >= 0 Then
+        Dim cellK As Range
+        For Each cellK In Target
+            If Trim(cellK.Value) <> "" Then
+                Call CreateZ1TransportDropdown(Me, cellK.Row, KUKAN_TRANSPORT_COLS(idx))
+                If Me.Cells(cellK.Row, KUKAN_TRANSPORT_COLS(idx)).Validation.Formula1 <> "" Then
+                    Call FillKukanFromM1(Me, cellK.Row, KUKAN_CODE_COLS(idx), Array(KUKAN_TRANSPORT_COLS(idx), KUKAN_STATION_COLS(idx), KUKAN_ARRIVAL_COLS(idx)))
+                    Call CreateM2Dropdown(Me, cellK.Row, KUKAN_CODE_COLS(idx), KUKAN_TICKET_COLS(idx))
                 End If
             Else
-                Call ClearKukanValidation(Me, cellAE.Row, 32)
+                Call ClearKukanValidation(Me, cellK.Row, KUKAN_TICKET_COLS(idx))
             End If
         Next
     End If
     
-    ' === Column AK (区間3 交通機関) changes ===
-    If Target.Column = 37 And Target.Row >= 7 Then
-        Dim cellAK As Range
-        For Each cellAK In Target
-            If Trim(cellAK.Value) <> "" Then
-                Call CreateZ1StationDropdown(Me, cellAK.Row, 37, 38)
+    ' === Ticket column changes (W, AD, AK, AR) ===
+    idx = GetIdx(Target.Column, KUKAN_TICKET_COLS)
+    If idx >= 0 Then
+        Dim cellTi As Range
+        For Each cellTi In Target
+            If Trim(cellTi.Value) <> "" Then
+                Call CreateM2CodeDropdown(Me, cellTi.Row, KUKAN_CODE_COLS(idx), KUKAN_TICKET_COLS(idx), KUKAN_CODE2_COLS(idx))
             Else
-                Call ClearKukanValidation(Me, cellAK.Row, 38)
-            End If
-        Next
-    End If
-    
-    ' === Column AL (区間3 利用区間発) changes ===
-    If Target.Column = 38 And Target.Row >= 7 Then
-        Dim cellAL As Range
-        For Each cellAL In Target
-            If Trim(cellAL.Value) <> "" Then
-                Call CreateM1KukanDDropdown(Me, cellAL.Row, 37, 38, 39)
-                If Me.Cells(cellAL.Row, 39).Validation.Formula1 = "" Then
-                    Call ClearKukanValidation(Me, cellAL.Row, 39)
-                End If
-            Else
-                Call ClearKukanValidation(Me, cellAL.Row, 39)
-            End If
-        Next
-    End If
-    
-    ' === Column AR (区間4 交通機関) changes ===
-    If Target.Column = 44 And Target.Row >= 7 Then
-        Dim cellAR As Range
-        For Each cellAR In Target
-            If Trim(cellAR.Value) <> "" Then
-                Call CreateZ1StationDropdown(Me, cellAR.Row, 44, 45)
-            Else
-                Call ClearKukanValidation(Me, cellAR.Row, 45)
-            End If
-        Next
-    End If
-    
-    ' === Column AS (区間4 利用区間発) changes ===
-    If Target.Column = 45 And Target.Row >= 7 Then
-        Dim cellAS As Range
-        For Each cellAS In Target
-            If Trim(cellAS.Value) <> "" Then
-                Call CreateM1KukanDDropdown(Me, cellAS.Row, 44, 45, 46)
-                If Me.Cells(cellAS.Row, 46).Validation.Formula1 = "" Then
-                    Call ClearKukanValidation(Me, cellAS.Row, 46)
-                End If
-            Else
-                Call ClearKukanValidation(Me, cellAS.Row, 46)
-            End If
-        Next
-    End If
-    
-    ' === Column S changes: Fill 区間１ from M1/M2 cache ===
-    If Target.Column = 19 And Target.Row >= 7 Then
-        Dim cellS As Range
-        For Each cellS In Target
-            If Trim(cellS.Value) <> "" Then
-                ' First check if T column has dropdown data
-                Call CreateZ1TransportDropdown(Me, cellS.Row, 20)
-                If Me.Cells(cellS.Row, 20).Validation.Formula1 <> "" Then
-                    Call FillKukanFromM1(Me, cellS.Row, 19, Array(20, 21, 22))  ' S->T,U,V
-                    Call CreateM2Dropdown(Me, cellS.Row, 19, 23)  ' S->W dropdown (券種)
-                End If
-            Else
-                Call ClearKukanValidation(Me, cellS.Row, 23)
-            End If
-        Next
-    End If
-    
-    ' === Column W changes: Fill 券種 dropdown -> generate X dropdown ===
-    If Target.Column = 23 And Target.Row >= 7 Then
-        Dim cellW As Range
-        For Each cellW In Target
-            If Trim(cellW.Value) <> "" Then
-                Call CreateM2CodeDropdown(Me, cellW.Row, 19, 23, 24)  ' kukanCode, kanshu -> X dropdown
-            Else
-                Call ClearKukanValidation(Me, cellW.Row, 24)
-            End If
-        Next
-    End If
-    
-    ' === Column Z changes: Fill 区間２ from M1/M2 cache ===
-    If Target.Column = 26 And Target.Row >= 7 Then
-        Dim cellZ As Range
-        For Each cellZ In Target
-            If Trim(cellZ.Value) <> "" Then
-                Call CreateZ1TransportDropdown(Me, cellZ.Row, 30)
-                If Me.Cells(cellZ.Row, 30).Validation.Formula1 <> "" Then
-                    Call FillKukanFromM1(Me, cellZ.Row, 26, Array(27, 28, 29))  ' Z->AA,AB,AC
-                    Call CreateM2Dropdown(Me, cellZ.Row, 26, 30)  ' Z->AD dropdown
-                End If
-            Else
-                Call ClearKukanValidation(Me, cellZ.Row, 30)
-            End If
-        Next
-    End If
-    
-    ' === Column AD changes: Fill 券種 dropdown -> generate AH dropdown ===
-    If Target.Column = 30 And Target.Row >= 7 Then
-        Dim cellAD As Range
-        For Each cellAD In Target
-            If Trim(cellAD.Value) <> "" Then
-                Call CreateM2CodeDropdown(Me, cellAD.Row, 26, 30, 31)  ' kukanCode, kanshu -> AH dropdown
-            Else
-                Call ClearKukanValidation(Me, cellAD.Row, 31)
-            End If
-        Next
-    End If
-    
-    ' === Column AG changes: Fill 区間３ from M1/M2 cache ===
-    If Target.Column = 33 And Target.Row >= 7 Then
-        Dim cellAG As Range
-        For Each cellAG In Target
-            If Trim(cellAG.Value) <> "" Then
-                Call CreateZ1TransportDropdown(Me, cellAG.Row, 37)
-                If Me.Cells(cellAG.Row, 37).Validation.Formula1 <> "" Then
-                    Call FillKukanFromM1(Me, cellAG.Row, 33, Array(34, 35, 36))  ' AG->AH,AI,AJ
-                    Call CreateM2Dropdown(Me, cellAG.Row, 33, 37)  ' AG->AK dropdown
-                End If
-            Else
-                Call ClearKukanValidation(Me, cellAG.Row, 37)
-            End If
-        Next
-    End If
-    
-    ' === Column AK changes: Fill 券種 dropdown -> generate AL dropdown ===
-    If Target.Column = 37 And Target.Row >= 7 Then
-        Dim cellAK As Range
-        For Each cellAK In Target
-            If Trim(cellAK.Value) <> "" Then
-                Call CreateM2CodeDropdown(Me, cellAK.Row, 33, 37, 38)  ' kukanCode, kanshu -> AL dropdown
-            Else
-                Call ClearKukanValidation(Me, cellAK.Row, 38)
-            End If
-        Next
-    End If
-    
-    ' === Column AN changes: Fill 区間４ from M1/M2 cache ===
-    If Target.Column = 40 And Target.Row >= 7 Then
-        Dim cellAN As Range
-        For Each cellAN In Target
-            If Trim(cellAN.Value) <> "" Then
-                Call CreateZ1TransportDropdown(Me, cellAN.Row, 44)
-                If Me.Cells(cellAN.Row, 44).Validation.Formula1 <> "" Then
-                    Call FillKukanFromM1(Me, cellAN.Row, 40, Array(41, 42, 43))  ' AN->AO,AP,AQ
-                    Call CreateM2Dropdown(Me, cellAN.Row, 40, 44)  ' AN->AR dropdown
-                End If
-            Else
-                Call ClearKukanValidation(Me, cellAN.Row, 44)
-            End If
-        Next
-    End If
-    
-    ' === Column AR changes: Fill 券種 dropdown -> generate AS dropdown ===
-    If Target.Column = 44 And Target.Row >= 7 Then
-        Dim cellAR As Range
-        For Each cellAR In Target
-            If Trim(cellAR.Value) <> "" Then
-                Call CreateM2CodeDropdown(Me, cellAR.Row, 40, 44, 45)  ' kukanCode, kanshu -> AS dropdown
-            Else
-                Call ClearKukanValidation(Me, cellAR.Row, 45)
+                Call ClearKukanValidation(Me, cellTi.Row, KUKAN_CODE2_COLS(idx))
             End If
         Next
     End If
diff --git a/src/thisWorkbook/Tukin_C1_Action.md b/src/thisWorkbook/Tukin_C1_Action.md
new file mode 100644
index 0000000..5f7f652
--- /dev/null
+++ b/src/thisWorkbook/Tukin_C1_Action.md
@@ -0,0 +1,81 @@
+# Tukin_C1 用户动作文档
+
+## 列动作映射
+
+### C列 (职员番号)
+- **触发条件**: C列 >= 第7行，内容变化
+- **动作**:
+  - 内容清空 → `ClearRowData` 清除整行
+  - 有内容 → `FillAddressFromO1` 填充地址下拉 + 生成4个区间的交通機関下拉
+
+---
+
+### 区間1
+
+| 列 | 动作 | 触发条件 | 处理逻辑 |
+|---|---|---|---|
+| **T** (交通機関) | 交通手段下拉变化 | Column=20 | `CreateZ1StationDropdown` → 生成U列(発)下拉 |
+| **U** (利用区間発) | 发站下拉变化 | Column=21 | `CreateM1KukanDDropdown` → 生成V列(着)下拉 |
+| **S** (区間コード) | 区间代码输入 | Column=19 | 生成T列下拉 → T列有值时填充U,V + 生成W列(券種)下拉 |
+| **W** (券種) | 券种下拉变化 | Column=23 | `CreateM2CodeDropdown` → 生成X列(コード)下拉 |
+
+---
+
+### 区間2
+
+| 列 | 动作 | 触发条件 | 处理逻辑 |
+|---|---|---|---|
+| **AA** (交通機関) | 交通手段下拉变化 | Column=27 | `CreateZ1StationDropdown` → 生成AB列(発)下拉 |
+| **AB** (利用区間発) | 发站下拉变化 | Column=28 | `CreateM1KukanDDropdown` → 生成AC列(着)下拉 |
+| **Z** (区間コード) | 区间代码输入 | Column=26 | 生成AA列下拉 → AA列有值时填充AB,AC + 生成AD列(券種)下拉 |
+| **AD** (券種) | 券种下拉变化 | Column=30 | `CreateM2CodeDropdown` → 生成AE列(コード)下拉 |
+
+---
+
+### 区間3
+
+| 列 | 动作 | 触发条件 | 处理逻辑 |
+|---|---|---|---|
+| **AH** (交通機関) | 交通手段下拉变化 | Column=34 | `CreateZ1StationDropdown` → 生成AI列(発)下拉 |
+| **AI** (利用区間発) | 发站下拉变化 | Column=35 | `CreateM1KukanDDropdown` → 生成AJ列(着)下拉 |
+| **AG** (区間コード) | 区间代码输入 | Column=33 | 生成AH列下拉 → AH列有值时填充AI,AJ + 生成AK列(券種)下拉 |
+| **AK** (券種) | 券种下拉变化 | Column=37 | `CreateM2CodeDropdown` → 生成AL列(コード)下拉 |
+
+---
+
+### 区間4
+
+| 列 | 动作 | 触发条件 | 处理逻辑 |
+|---|---|---|---|
+| **AO** (交通機関) | 交通手段下拉变化 | Column=41 | `CreateZ1StationDropdown` → 生成AP列(発)下拉 |
+| **AP** (利用区間発) | 发站下拉变化 | Column=42 | `CreateM1KukanDDropdown` → 生成AQ列(着)下拉 |
+| **AN** (区間コード) | 区间代码输入 | Column=40 | 生成AO列下拉 → AO列有值时填充AP,AQ + 生成AR列(券種)下拉 |
+| **AR** (券種) | 券种下拉变化 | Column=44 | `CreateM2CodeDropdown` → 生成AS列(コード)下拉 |
+
+---
+
+## 方法列表
+
+| 方法名 | 功能 |
+|---|---|
+| `FillAddressFromO1` | 根据职员番号(C列)从O1缓存填充住所下拉(I列) |
+| `CreateZ1TransportDropdown` | 生成交通機関下拉 |
+| `CreateZ1StationDropdown` | 根据交通手段从Z1缓存生成发站下拉 |
+| `CreateM1KukanDDropdown` | 根据交通手段+发站从M1KukanD缓存生成着站下拉 |
+| `FillKukanFromM1` | 根据区间代码从M1缓存填充区间信息(T/U/V等) |
+| `CreateM2Dropdown` | 根据区间代码生成券種下拉 |
+| `CreateM2CodeDropdown` | 根据区间代码+券種生成コード下拉 |
+| `ClearRowData` | 清除整行数据 |
+| `ClearKukanValidation` | 清除指定列的验证下拉 |
+
+---
+
+## 缓存依赖
+
+| 缓存 | 用途 |
+|---|---|
+| `o1Cache` | 职员番号 → 住所 |
+| `z1Cache` | 交通手段 → 站点 |
+| `m1KukanDCache` | 交通手段+发站 → 着站 |
+| `m1Cache` | 区间代码 → 区间信息 |
+| `m2Cache` | 区间代码+券種 → コード |
diff --git a/src/thisWorkbook/Tukin_C1_Mapping.md b/src/thisWorkbook/Tukin_C1_Mapping.md
new file mode 100644
index 0000000..4d5f0e3
--- /dev/null
+++ b/src/thisWorkbook/Tukin_C1_Mapping.md
@@ -0,0 +1,29 @@
+### 届出情報
+|列|C列|D列|E列|F列|G列|H列|
+|--------|--------|--------|--------|--------|--------|--------|
+|ヘッダ|職員番号|事実発生年月日|提出年月日|受理年月日|届出の事由コード|届出の備考|
+|データ型|8|日付|日付|日付|Enum|文字列|
+
+### 区間１情報
+|列|S列|T列|U列|V列|W列|X列|Y列|
+|--------|--------|--------|--------|--------|--------|--------|--------|
+|ヘッダ|区間１区間コード|区間１交通機関|区間１発|区間１着|区間１券種|区間１コード|区間１支給開始年月|
+|データ型|5|3|文字列|文字列|Enum|3|日付|
+
+### 区間２情報
+|列|Z列|AA列|AB列|AC列|AD列|AE列|AF列|
+|--------|--------|--------|--------|--------|--------|--------|--------|
+|ヘッダ|区間２区間コード|区間２交通機関|区間２発|区間２着|区間２券種|区間２コード|区間２支給開始年月|
+|データ型|5|3|文字列|文字列|Enum|3|日付|
+
+### 区間３情報
+|列|AG列|AH列|AI列|AJ列|AK列|AL列|AM列|
+|--------|--------|--------|--------|--------|--------|--------|--------|
+|ヘッダ|区間３区間コード|区間３交通機関|区間３発|区間３着|区間３券種|区間３コード|区間３支給開始年月|
+|データ型|5|3|文字列|文字列|Enum|3|日付|
+
+### 区間４情報
+|列|AN列|AO列|AP列|AQ列|AR列|AS列|AT列|
+|--------|--------|--------|--------|--------|--------|--------|--------|
+|ヘッダ|区間４区間コード|区間４交通機関|区間４発|区間４着|区間４券種|区間４コード|区間４支給開始年月|
+|データ型|5|3|文字列|文字列|Enum|3|日付|
\ 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 8ef126d..f16a78c 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