diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index c3eb0bb523..48c4c36828 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1281,6 +1281,7 @@ admin/views/instance.vue:
   mb: "メガバイト単位"
   recaptcha-config: "reCAPTCHAの設定"
   recaptcha-info: "reCAPTCHAを有効にする場合、reCAPTCHAトークンを取得する必要があります。https://www.google.com/recaptcha/intro/ にアクセスしてトークンを取得してください。"
+  recaptcha-info2: "v3は非対応です。v2を使用してください。"
   enable-recaptcha: "reCAPTCHAを有効にする"
   recaptcha-site-key: "サイトキー"
   recaptcha-secret-key: "シークレットキー"
diff --git a/src/client/app/admin/views/instance.vue b/src/client/app/admin/views/instance.vue
index 72ae3384b5..c4d445fbb8 100644
--- a/src/client/app/admin/views/instance.vue
+++ b/src/client/app/admin/views/instance.vue
@@ -159,6 +159,7 @@
 			<ui-switch v-model="enableRecaptcha">{{ $t('enable-recaptcha') }}</ui-switch>
 			<template v-if="enableRecaptcha">
 				<ui-info>{{ $t('recaptcha-info') }}</ui-info>
+				<ui-info warn>{{ $t('recaptcha-info2') }}</ui-info>
 				<ui-horizon-group inputs>
 					<ui-input v-model="recaptchaSiteKey" :disabled="!enableRecaptcha"><template #icon><fa icon="key"/></template>{{ $t('recaptcha-site-key') }}</ui-input>
 					<ui-input v-model="recaptchaSecretKey" :disabled="!enableRecaptcha"><template #icon><fa icon="key"/></template>{{ $t('recaptcha-secret-key') }}</ui-input>