diff --git a/frontend/AGENTS.md b/frontend/AGENTS.md
index 1a93532..bd9e5a6 100644
--- a/frontend/AGENTS.md
+++ b/frontend/AGENTS.md
@@ -153,6 +153,9 @@ pass or the remaining failure is clearly blocked.
 - When new user-facing wording appears necessary, ask the user for the exact
   wording and placement before implementing it.
 - Do not invent replacement copy when removing unrequested wording.
+- Do not use `タグなし` as user-facing copy for an empty tag state. When the
+  tag state is empty, show no copy. If actual data contains the tag name
+  `タグなし`, treat it as ordinary data and display it normally.
 - When adding dynamic tag colour classes, update `tailwind.config.js` safelist
   if the class cannot be statically detected.
 - Do not introduce new UI libraries or production dependencies without approval.
diff --git a/frontend/src/components/posts/import/PostImportRowSummary.tsx b/frontend/src/components/posts/import/PostImportRowSummary.tsx
index 3523f88..2b3cfab 100644
--- a/frontend/src/components/posts/import/PostImportRowSummary.tsx
+++ b/frontend/src/components/posts/import/PostImportRowSummary.tsx
@@ -86,9 +86,10 @@ const PostImportRowSummary: FC<Props> = (
             <div className="truncate text-xs text-neutral-600 dark:text-neutral-300">
               {row.url}
             </div>
-            <div className="truncate text-xs text-neutral-500 dark:text-neutral-400">
-              {String (row.attributes.tags ?? '') || 'タグなし'}
-            </div>
+            {String (row.attributes.tags ?? '') && (
+                <div className="truncate text-xs text-neutral-500 dark:text-neutral-400">
+                  {String (row.attributes.tags ?? '')}
+                </div>)}
             <div className="text-xs text-neutral-500 dark:text-neutral-400">
               {summaryDate (row)}
             </div>
@@ -143,9 +144,10 @@ const PostImportRowSummary: FC<Props> = (
               <div className="flex flex-wrap gap-2">
                 {displayStatus != null && <PostImportStatusBadge value={displayStatus}/>}
               </div>
-              <div className="text-xs text-neutral-500 dark:text-neutral-400">
-                {String (row.attributes.tags ?? '') || 'タグなし'}
-              </div>
+              {String (row.attributes.tags ?? '') && (
+                  <div className="text-xs text-neutral-500 dark:text-neutral-400">
+                    {String (row.attributes.tags ?? '')}
+                  </div>)}
               <div className="text-xs text-neutral-500 dark:text-neutral-400">
                 {summaryDate (row)}
               </div>
diff --git a/frontend/src/pages/materials/MaterialListPage.tsx b/frontend/src/pages/materials/MaterialListPage.tsx
index 9629733..ea7dbb7 100644
--- a/frontend/src/pages/materials/MaterialListPage.tsx
+++ b/frontend/src/pages/materials/MaterialListPage.tsx
@@ -482,7 +482,7 @@ const MaterialListPage: FC = () => {
 			className={inputClass (invalid)}>
 		      <option value="all">すべて</option>
 		      <option value="tagged">タグあり</option>
-		      <option value="untagged">タグなし</option>
+		      <option value="untagged"></option>
 		    </select>)}
 	      </FormField>
 
diff --git a/frontend/src/pages/posts/PostImportReviewPage.tsx b/frontend/src/pages/posts/PostImportReviewPage.tsx
index 81f1b8b..3bfb736 100644
--- a/frontend/src/pages/posts/PostImportReviewPage.tsx
+++ b/frontend/src/pages/posts/PostImportReviewPage.tsx
@@ -814,7 +814,8 @@ const PostImportReviewPage: FC<Props> = ({ user }) => {
 	    importErrors: undefined })
       })
       const persisted = await persistSession (buildSession (nextRows))
-      if (persisted != null && processableImportRows (persisted.rows).length === 0)
+      if (persisted != null
+	  && persisted.rows.every (row => isCompletedReviewRow (row)))
 	finishImport ()
     }
     catch
@@ -845,10 +846,7 @@ const PostImportReviewPage: FC<Props> = ({ user }) => {
     {
       const processingRows = processableImportRows (currentSession.rows)
       if (processingRows.length === 0)
-	{
-	  finishImport ()
-	  return
-	}
+	return
 
       const result = await apiPost<{ results: BulkApiRow[] }>(
 	  '/posts/bulk',
@@ -879,7 +877,8 @@ const PostImportReviewPage: FC<Props> = ({ user }) => {
 	    importErrors: undefined })
       })
       const persisted = await persistSession (buildSession (nextRows))
-      if (persisted != null && processableImportRows (persisted.rows).length === 0)
+      if (persisted != null
+	  && persisted.rows.every (row => isCompletedReviewRow (row)))
 	finishImport ()
     }
     catch
@@ -1013,7 +1012,7 @@ const PostImportFooter = (
 	  <Button
 	      type="button"
 	      onClick={onSubmit}
-	      disabled={loading || creatableCount === 0}>
+	      disabled={loading}>
 	    {creatableCount > 1 ? '一括追加' : '追加'}
 	  </Button>
 	</div>