diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index edc6244d3..c0c72c470 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -197,3 +197,13 @@ const user = await Users.findOne(userId).then(ensure);
 // }
 // の糖衣構文のような扱いです
 ```
+
+### Migration作成方法
+コードの変更をした後、`ormconfig.json`（書き方はCONTRIBUTING.mdを参照）を用意し、
+
+```
+npm i -g ts-node
+ts-node ./node_modules/typeorm/cli.js migration:generate -n 変更の名前
+```
+
+作成されたスクリプトは不必要な変更を含むため除去してください。
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 14b8daad4..c3bb4f775 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -508,6 +508,7 @@ common/views/components/nav.vue:
   repository: "リポジトリ"
   develop: "開発者"
   feedback: "フィードバック"
+  tos: "利用規約"
 
 common/views/components/note-menu.vue:
   mention: "メンション"
@@ -628,6 +629,8 @@ common/views/components/signup.vue:
   password-matched: "確認されました"
   password-not-matched: "一致していません"
   recaptcha: "認証"
+  agree-to: "{0}に同意します。"
+  tos: "利用規約"
   create: "アカウント作成"
   some-error: "何らかの原因によりアカウントの作成に失敗しました。再度お試しください。"
 
@@ -1215,10 +1218,15 @@ admin/views/instance.vue:
   instance-name: "インスタンス名"
   instance-description: "インスタンスの紹介"
   host: "ホスト"
+  icon-url: "アイコンURL"
+  logo-url: "ロゴURL"
   banner-url: "バナー画像URL"
   error-image-url: "エラー画像URL"
   languages: "インスタンスの対象言語"
   languages-desc: "スペースで区切って複数設定できます。"
+  tos-url: "利用規約URL"
+  repository-url: "リポジトリURL"
+  feedback-url: "フィードバックURL"
   maintainer-config: "管理者情報"
   maintainer-name: "管理者名"
   maintainer-email: "管理者の連絡先"
diff --git a/migration/1557761316509-AddSomeUrls.ts b/migration/1557761316509-AddSomeUrls.ts
new file mode 100644
index 000000000..a0a2c7970
--- /dev/null
+++ b/migration/1557761316509-AddSomeUrls.ts
@@ -0,0 +1,16 @@
+import {MigrationInterface, QueryRunner} from "typeorm";
+
+export class AddSomeUrls1557761316509 implements MigrationInterface {
+
+    public async up(queryRunner: QueryRunner): Promise<any> {
+        await queryRunner.query(`ALTER TABLE "meta" ADD "ToSUrl" character varying(512)`);
+        await queryRunner.query(`ALTER TABLE "meta" ADD "repositoryUrl" character varying(512) NOT NULL DEFAULT 'https://github.com/syuilo/misskey'`);
+        await queryRunner.query(`ALTER TABLE "meta" ADD "feedbackUrl" character varying(512) DEFAULT 'https://github.com/syuilo/misskey/issues/new'`);
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<any> {
+        await queryRunner.query(`ALTER TABLE "meta" DROP COLUMN "feedbackUrl"`);
+        await queryRunner.query(`ALTER TABLE "meta" DROP COLUMN "repositoryUrl"`);
+        await queryRunner.query(`ALTER TABLE "meta" DROP COLUMN "ToSUrl"`);
+    }
+}
diff --git a/src/client/app/admin/views/instance.vue b/src/client/app/admin/views/instance.vue
index d81edc8fe..3bbe6579d 100644
--- a/src/client/app/admin/views/instance.vue
+++ b/src/client/app/admin/views/instance.vue
@@ -10,6 +10,9 @@
 			<ui-input v-model="mascotImageUrl"><template #icon><fa icon="link"/></template>{{ $t('logo-url') }}</ui-input>
 			<ui-input v-model="bannerUrl"><template #icon><fa icon="link"/></template>{{ $t('banner-url') }}</ui-input>
 			<ui-input v-model="errorImageUrl"><template #icon><fa icon="link"/></template>{{ $t('error-image-url') }}</ui-input>
+			<ui-input v-model="ToSUrl"><template #icon><fa icon="link"/></template>{{ $t('tos-url') }}</ui-input>
+			<ui-input v-model="repositoryUrl"><template #icon><fa icon="link"/></template>{{ $t('repository-url') }}</ui-input>
+			<ui-input v-model="feedbackUrl"><template #icon><fa icon="link"/></template>{{ $t('feedback-url') }}</ui-input>
 			<ui-input v-model="languages"><template #icon><fa icon="language"/></template>{{ $t('languages') }}<template #desc>{{ $t('languages-desc') }}</template></ui-input>
 		</section>
 		<section class="fit-bottom">
@@ -156,6 +159,9 @@ export default Vue.extend({
 			host: toUnicode(host),
 			maintainerName: null,
 			maintainerEmail: null,
+			ToSUrl: null,
+			repositoryUrl: "https://github.com/syuilo/misskey",
+			feedbackUrl: null,
 			disableRegistration: false,
 			disableLocalTimeline: false,
 			disableGlobalTimeline: false,
@@ -207,6 +213,9 @@ export default Vue.extend({
 		this.$root.getMeta(true).then(meta => {
 			this.maintainerName = meta.maintainerName;
 			this.maintainerEmail = meta.maintainerEmail;
+			this.ToSUrl = meta.ToSUrl;
+			this.repositoryUrl = meta.repositoryUrl;
+			this.feedbackUrl = meta.feedbackUrl;
 			this.disableRegistration = meta.disableRegistration;
 			this.disableLocalTimeline = meta.disableLocalTimeline;
 			this.disableGlobalTimeline = meta.disableGlobalTimeline;
@@ -268,6 +277,9 @@ export default Vue.extend({
 			this.$root.api('admin/update-meta', {
 				maintainerName: this.maintainerName,
 				maintainerEmail: this.maintainerEmail,
+				ToSUrl: this.ToSUrl,
+				repositoryUrl: this.repositoryUrl,
+				feedbackUrl: this.feedbackUrl,
 				disableRegistration: this.disableRegistration,
 				disableLocalTimeline: this.disableLocalTimeline,
 				disableGlobalTimeline: this.disableGlobalTimeline,
diff --git a/src/client/app/common/views/components/nav.vue b/src/client/app/common/views/components/nav.vue
index 9d4e7091b..da26fd1b8 100644
--- a/src/client/app/common/views/components/nav.vue
+++ b/src/client/app/common/views/components/nav.vue
@@ -1,12 +1,16 @@
 <template>
 <span class="mk-nav">
 	<a :href="aboutUrl">{{ $t('about') }}</a>
+	<template v-if="ToSUrl !== null">
+		<i>・</i>
+		<a :href="ToSUrl" target="_blank">{{ $t('tos') }}</a>
+	</template>
 	<i>・</i>
 	<a :href="repositoryUrl" rel="noopener" target="_blank">{{ $t('repository') }}</a>
 	<i>・</i>
 	<a :href="feedbackUrl" rel="noopener" target="_blank">{{ $t('feedback') }}</a>
 	<i>・</i>
-	<a href="/dev">{{ $t('develop') }}</a>
+	<a href="/dev" target="_blank">{{ $t('develop') }}</a>
 </span>
 </template>
 
@@ -21,8 +25,17 @@ export default Vue.extend({
 		return {
 			aboutUrl: `/docs/${lang}/about`,
 			repositoryUrl: 'https://github.com/syuilo/misskey',
-			feedbackUrl: 'https://github.com/syuilo/misskey/issues/new'
+			feedbackUrl: 'https://github.com/syuilo/misskey/issues/new',
+			ToSUrl: null
 		}
+	},
+	
+	mounted() {
+		this.$root.getMeta(true).then(meta => {
+			this.repositoryUrl = meta.repositoryUrl;
+			this.feedbackUrl = meta.feedbackUrl;
+			this.ToSUrl = meta.ToSUrl;
+		})
 	}
 });
 </script>
diff --git a/src/client/app/common/views/components/signup.vue b/src/client/app/common/views/components/signup.vue
index 9b1df7977..bf8e5d25b 100644
--- a/src/client/app/common/views/components/signup.vue
+++ b/src/client/app/common/views/components/signup.vue
@@ -37,8 +37,13 @@
 				<p v-if="passwordRetypeState == 'not-match'" style="color:#FF1161"><fa icon="exclamation-triangle" fixed-width/> {{ $t('password-not-matched') }}</p>
 			</template>
 		</ui-input>
+		<ui-switch v-model="ToSAgreement" v-if="meta.ToSUrl">
+			<i18n path="agree-to">
+				<a :href="meta.ToSUrl" target="_blank">{{ $t('tos') }}</a>
+			</i18n>
+		</ui-switch>
 		<div v-if="meta.enableRecaptcha" class="g-recaptcha" :data-sitekey="meta.recaptchaSiteKey" style="margin: 16px 0;"></div>
-		<ui-button type="submit">{{ $t('create') }}</ui-button>
+		<ui-button type="submit" :disabled="!(meta.ToSUrl ? ToSAgreement : true)">{{ $t('create') }}</ui-button>
 	</template>
 </form>
 </template>
@@ -64,7 +69,8 @@ export default Vue.extend({
 			usernameState: null,
 			passwordStrength: '',
 			passwordRetypeState: null,
-			meta: null
+			meta: {},
+			ToSAgreement: false
 		}
 	},
 
diff --git a/src/models/entities/meta.ts b/src/models/entities/meta.ts
index 2c36b8333..c3797a9ed 100644
--- a/src/models/entities/meta.ts
+++ b/src/models/entities/meta.ts
@@ -268,4 +268,24 @@ export class Meta {
 		nullable: true
 	})
 	public discordClientSecret: string | null;
+
+	@Column('varchar', {
+		length: 512,
+		nullable: true
+	})
+	public ToSUrl: string | null;
+
+	@Column('varchar', {
+		length: 512,
+		default: 'https://github.com/syuilo/misskey',
+		nullable: false
+	})
+	public repositoryUrl: string;
+
+	@Column('varchar', {
+		length: 512,
+		default: 'https://github.com/syuilo/misskey/issues/new',
+		nullable: true
+	})
+	public feedbackUrl: string | null;
 }
diff --git a/src/server/api/endpoints/admin/update-meta.ts b/src/server/api/endpoints/admin/update-meta.ts
index 8a2019fcc..e34840e90 100644
--- a/src/server/api/endpoints/admin/update-meta.ts
+++ b/src/server/api/endpoints/admin/update-meta.ts
@@ -330,6 +330,27 @@ export const meta = {
 				'ja-JP': 'ServiceWorkerのVAPIDキーペアの秘密鍵'
 			}
 		},
+
+		ToSUrl: {
+			validator: $.optional.nullable.str,
+			desc: {
+				'ja-JP': '利用規約のURL'
+			}
+		},
+
+		repositoryUrl: {
+			validator: $.optional.str,
+			desc: {
+				'ja-JP': 'リポジトリのURL'
+			}
+		},
+
+		feedbackUrl: {
+			validator: $.optional.str,
+			desc: {
+				'ja-JP': 'フィードバックのURL'
+			}
+		}
 	}
 };
 
@@ -516,6 +537,18 @@ export default define(meta, async (ps) => {
 		set.swPrivateKey = ps.swPrivateKey;
 	}
 
+	if (ps.ToSUrl !== undefined) {
+		set.ToSUrl = ps.ToSUrl;
+	}
+
+	if (ps.repositoryUrl !== undefined) {
+		set.repositoryUrl = ps.repositoryUrl;
+	}
+
+	if (ps.feedbackUrl !== undefined) {
+		set.feedbackUrl = ps.feedbackUrl;
+	}
+
 	await getConnection().transaction(async transactionalEntityManager => {
 		const meta = await transactionalEntityManager.findOne(Meta, {
 			order: {
diff --git a/src/server/api/endpoints/meta.ts b/src/server/api/endpoints/meta.ts
index 5667e7fbb..e29edae26 100644
--- a/src/server/api/endpoints/meta.ts
+++ b/src/server/api/endpoints/meta.ts
@@ -106,6 +106,9 @@ export default define(meta, async (ps, me) => {
 		uri: config.url,
 		description: instance.description,
 		langs: instance.langs,
+		ToSUrl: instance.ToSUrl,
+		repositoryUrl: instance.repositoryUrl,
+		feedbackUrl: instance.feedbackUrl,
 
 		secure: config.https != null,
 		machine: os.hostname(),
diff --git a/src/server/nodeinfo.ts b/src/server/nodeinfo.ts
index d3ad90fab..da1e4e7b5 100644
--- a/src/server/nodeinfo.ts
+++ b/src/server/nodeinfo.ts
@@ -26,6 +26,9 @@ const nodeinfo2 = async () => {
 			maintainerName,
 			maintainerEmail,
 			langs,
+			ToSUrl,
+			repositoryUrl,
+			feedbackUrl,
 			announcements,
 			disableRegistration,
 			disableLocalTimeline,
@@ -77,6 +80,9 @@ const nodeinfo2 = async () => {
 				email: maintainerEmail
 			},
 			langs,
+			ToSUrl,
+			repositoryUrl,
+			feedbackUrl,
 			announcements,
 			disableRegistration,
 			disableLocalTimeline,