diff --git a/.github/workflows/release-upload-zip.yml b/.github/workflows/release-upload-zip.yml
index 4dcf1c3..93782a7 100644
--- a/.github/workflows/release-upload-zip.yml
+++ b/.github/workflows/release-upload-zip.yml
@@ -1,11 +1,9 @@
 name: Release - Upload ZIP
 
 on:
-  pull_request:
-    branches:
-      - main
-    types:
-      - closed
+  push:
+    tags:
+      - 'v*'   # v1.3.0.0 など
 
 permissions:
   contents: write
@@ -15,85 +13,58 @@ env:
 
 jobs:
   release:
-    # 通常のマージでのみ動作することを想定
-    if: github.event.pull_request.merged == true
-    runs-on: windows-latest # 安定した最新のWindows環境
+    runs-on: windows-2025-vs2026
 
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-        with:
-          # マージコミットではなく、ソースブランチのHEADを一時的に見るか、全履歴を取得
-          fetch-depth: 0
-
-      - name: Resolve tag from source branch (v*)
-        id: tag_check
-        shell: pwsh
-        run: |
-          git fetch --tags --force
-          $headSha = '${{ github.event.pull_request.head.sha }}'
-          $baseSha = '${{ github.event.pull_request.base.sha }}'
-          
-          $selectedTag = git describe --tags --match 'v*' --abbrev=0 $headSha 2>$null
-          if (-not $selectedTag) {
-            Write-Error "No reachable v* tag found from source branch head commit: $headSha"
-            exit 1
-          }
-
-          $tagCommit = git rev-list -n 1 $selectedTag
-          
-          # 初期値を設定
-          $shouldRelease = "true"
-          
-          git merge-base --is-ancestor $tagCommit $baseSha
-          if ($LASTEXITCODE -eq 0) {
-            $shouldRelease = "false"
-            Write-Host "Tag $selectedTag already existed on main side before merge. Skipping release flow."
-          }
-
-          # GitHubの環境変数とステップ出力に保存
-          "SHOULD_RELEASE=$shouldRelease" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
-          "RELEASE_TAG=$selectedTag" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
-          Write-Host "Using tag: $selectedTag"
 
       - name: Setup .NET
-        if: env.SHOULD_RELEASE == 'true'
         uses: actions/setup-dotnet@v4
         with:
           dotnet-version: '8.0.x'
 
       - name: Setup MSBuild
-        if: env.SHOULD_RELEASE == 'true'
         uses: microsoft/setup-msbuild@v2
+        with:
+          vs-version: '17.0'
 
+      # packages.config 対応
       - name: NuGet Restore
-        if: env.SHOULD_RELEASE == 'true'
         run: nuget restore SampleCSharpBulkRAGReg.sln
 
       - name: Build (Release)
-        if: env.SHOULD_RELEASE == 'true'
-        run: |
-          msbuild SampleCSharpBulkRAGReg.sln `
-            /p:Configuration=Release `
-            /p:Platform="Any CPU" `
-            /t:Build
+        run: msbuild SampleCSharpUI.sln `
+              /p:Configuration=Release `
+              /p:Platform="Any CPU" `
+              /t:Build
 
+      # ZIP 作成（タグ名を使用）
       - name: Create ZIP
-        if: env.SHOULD_RELEASE == 'true'
         run: |
           Compress-Archive `
             -Path SampleCSharpBulkRAGReg/bin/Release/* `
-            -DestinationPath SampleCSharpBulkRAGReg-${{ env.RELEASE_TAG }}.zip
+            -DestinationPath SampleCSharpBulkRAGReg-${{ github.ref_name }}.zip
 
-      # 非推奨アクションを最新の定番アクションに統合
-      - name: Create and Upload GitHub Release
-        if: env.SHOULD_RELEASE == 'true'
-        uses: softprops/action-gh-release@v2
+      # Release 作成（タグ名を使用）
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          tag_name: ${{ env.RELEASE_TAG }}
-          name: Release ${{ env.RELEASE_TAG }}
+          tag_name: ${{ github.ref_name }}
+          release_name: Release ${{ github.ref_name }}
           draft: false
           prerelease: false
-          files: SampleCSharpBulkRAGReg-${{ env.RELEASE_TAG }}.zip
+
+      # ZIP を Release に Upload（ご指定どおり）
+      - name: Upload ZIP to Release
+        uses: actions/upload-release-asset@v1
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
\ No newline at end of file
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: SampleCSharpBulkRAGReg-${{ github.ref_name }}.zip
+          asset_name: SampleCSharpBulkRAGReg-${{ github.ref_name }}.zip
+          asset_content_type: application/zip