diff --git a/src/service/command/meme/index.ts b/src/service/command/meme/index.ts
index aded7161..1d8c8e4d 100644
--- a/src/service/command/meme/index.ts
+++ b/src/service/command/meme/index.ts
@@ -6,6 +6,7 @@ import { lolicon } from './lolicon.js';
 import { moeta } from './moeta.js';
 import { n } from './n.js';
 import { nigetane } from './nigetane.js';
+import { nine } from './nine.js';
 import { ojaru } from './ojaru.js';
 import { takopi } from './takopi.js';
 import { web3 } from './web3.js';
@@ -21,5 +22,6 @@ export const memes = [
   moeta,
   kenjou,
   koume,
-  ojaru
+  ojaru,
+  nine
 ];
diff --git a/src/service/command/meme/nine.ts b/src/service/command/meme/nine.ts
new file mode 100644
index 00000000..68047558
--- /dev/null
+++ b/src/service/command/meme/nine.ts
@@ -0,0 +1,13 @@
+import type { MemeTemplate } from '../../../model/meme-template.js';
+
+export const nine: MemeTemplate<never, never> = {
+  commandNames: ['nine'],
+  description: '〇〇は〇〇が9割',
+  flagsKeys: [],
+  optionsKeys: [],
+  errorMessage: '人は引数ミスが9割',
+  generate(args) {
+    const [option1, option2] = args.body.split(' ');
+    return `${option1}は${option2}が9割`;
+  }
+};
diff --git a/src/service/command/meme/test/dousurya.test.ts b/src/service/command/meme/test/dousurya.test.ts
index 532b9d1c..5ea8bb2f 100644
--- a/src/service/command/meme/test/dousurya.test.ts
+++ b/src/service/command/meme/test/dousurya.test.ts
@@ -8,6 +8,10 @@ describe('meme', () => {
   const responder = new Meme();
 
   it('use case of dousurya', async () => {
+    /**
+     * !dousurya と !dousureba のテストケースです。
+     * 一見同じように見えるが、違うので重複してたからと削除しないよう注意してほしい
+     */
     await responder.on(
       createMockMessage(
         parseStringsOrThrow(['dousurya', 'こるく'], responder.schema),
diff --git a/src/service/command/meme/test/nine.test.ts b/src/service/command/meme/test/nine.test.ts
new file mode 100644
index 00000000..560e5447
--- /dev/null
+++ b/src/service/command/meme/test/nine.test.ts
@@ -0,0 +1,36 @@
+import { describe, expect, it } from 'vitest';
+import { Meme } from '../../meme.js';
+
+import { createMockMessage } from '../../command-message.js';
+import { parseStringsOrThrow } from '../../../../adaptor/proxy/command/schema.js';
+
+describe('meme', () => {
+  const responder = new Meme();
+
+  it('use case of nine', async () => {
+    await responder.on(
+      createMockMessage(
+        parseStringsOrThrow(['nine', '限界開発鯖', 'オタク'], responder.schema),
+        (message) => {
+          expect(message).toStrictEqual({
+            description: `限界開発鯖はオタクが9割`
+          });
+        }
+      )
+    );
+  });
+
+  it('args null (nine)', async () => {
+    await responder.on(
+      createMockMessage(
+        parseStringsOrThrow(['nine'], responder.schema),
+        (message) => {
+          expect(message).toStrictEqual({
+            description: '人は引数ミスが9割',
+            title: '引数が不足してるみたいだ。'
+          });
+        }
+      )
+    );
+  });
+});