diff --git a/frontend/src/components/TagDetailSidebar.tsx b/frontend/src/components/TagDetailSidebar.tsx
index 91d7092..26e601e 100644
--- a/frontend/src/components/TagDetailSidebar.tsx
+++ b/frontend/src/components/TagDetailSidebar.tsx
@@ -2,6 +2,7 @@ import { useEffect, useState } from 'react'
 
 import TagLink from '@/components/TagLink'
 import TagSearch from '@/components/TagSearch'
+import SectionTitle from '@/components/common/SectionTitle'
 import SubsectionTitle from '@/components/common/SubsectionTitle'
 import SidebarComponent from '@/components/layout/SidebarComponent'
 import { CATEGORIES } from '@/consts'
@@ -53,11 +54,26 @@ export default (({ post }: Props) => {
 	    <div className="my-3" key={cat}>
 	      <SubsectionTitle>{categoryNames[cat]}</SubsectionTitle>
 	      <ul>
-		{tags[cat].map ((tag, i) => (
-		    <li key={i} className="mb-1">
+		{tags[cat].map (tag => (
+		    <li key={tag.id} className="mb-1">
 		      <TagLink tag={tag}/>
 		    </li>))}
 	      </ul>
 	    </div>))}
+	{post && (
+	    <div>
+	      <SectionTitle>情報</SectionTitle>
+	      <ul>
+		<li>Id.: {post.id}</li>
+		{/* <li>耕作者: {post.createdBy}</li> */}
+		<li>耕作日時: {post.createdAt}</li>
+		<li>
+		  リンク:
+		  <a href={post.url} target="_blank">
+		    {post.url}
+		  </a>
+		</li>
+	      </ul>
+	    </div>)}
       </SidebarComponent>)
 }) satisfies FC<Props>