diff --git a/packages/backend/migration/1698912474617-enhance-mail-verification.js b/packages/backend/migration/1698912474617-enhance-mail-verification.js
deleted file mode 100644
index 6d2e4b9a55..0000000000
--- a/packages/backend/migration/1698912474617-enhance-mail-verification.js
+++ /dev/null
@@ -1,16 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and other misskey contributors
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-export class EnhanceMailVerification1698912474617 {
-    name = 'EnhanceMailVerification1698912474617'
-
-    async up(queryRunner) {
-        await queryRunner.query(`ALTER TABLE "meta" ADD "emailVerificationExpiresIn" integer NOT NULL DEFAULT '0'`);
-    }
-
-    async down(queryRunner) {
-        await queryRunner.query(`ALTER TABLE "meta" DROP COLUMN "emailVerificationExpiresIn"`);
-    }
-}
diff --git a/packages/backend/src/models/Meta.ts b/packages/backend/src/models/Meta.ts
index 91a2495af2..360239f509 100644
--- a/packages/backend/src/models/Meta.ts
+++ b/packages/backend/src/models/Meta.ts
@@ -174,12 +174,6 @@ export class MiMeta {
 	})
 	public emailRequiredForSignup: boolean;
 
-	@Column('integer', {
-		default: 0,
-		comment: 'The expiration time of email verification (unit: minute)',
-	})
-	public emailVerificationExpiresIn: number;
-
 	@Column('boolean', {
 		default: false,
 	})
diff --git a/packages/backend/src/server/api/endpoints/admin/meta.ts b/packages/backend/src/server/api/endpoints/admin/meta.ts
index 4eb8f860d3..73c84a8674 100644
--- a/packages/backend/src/server/api/endpoints/admin/meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/meta.ts
@@ -32,10 +32,6 @@ export const meta = {
 				type: 'boolean',
 				optional: false, nullable: false,
 			},
-			emailVerificationExpiresIn: {
-				type: 'number',
-				optional: false, nullable: false,
-			},
 			enableHcaptcha: {
 				type: 'boolean',
 				optional: false, nullable: false,
@@ -357,7 +353,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				privacyPolicyUrl: instance.privacyPolicyUrl,
 				disableRegistration: instance.disableRegistration,
 				emailRequiredForSignup: instance.emailRequiredForSignup,
-				emailVerificationExpiresIn: instance.emailVerificationExpiresIn,
 				enableHcaptcha: instance.enableHcaptcha,
 				hcaptchaSiteKey: instance.hcaptchaSiteKey,
 				enableRecaptcha: instance.enableRecaptcha,
diff --git a/packages/backend/src/server/api/endpoints/admin/update-meta.ts b/packages/backend/src/server/api/endpoints/admin/update-meta.ts
index 9a520d3dc8..c58569a31c 100644
--- a/packages/backend/src/server/api/endpoints/admin/update-meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/update-meta.ts
@@ -59,7 +59,6 @@ export const paramDef = {
 		cacheRemoteFiles: { type: 'boolean' },
 		cacheRemoteSensitiveFiles: { type: 'boolean' },
 		emailRequiredForSignup: { type: 'boolean' },
-		emailVerificationExpiresIn: { type: 'integer', minimum: 0 },
 		enableHcaptcha: { type: 'boolean' },
 		hcaptchaSiteKey: { type: 'string', nullable: true },
 		hcaptchaSecretKey: { type: 'string', nullable: true },
@@ -250,10 +249,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				set.emailRequiredForSignup = ps.emailRequiredForSignup;
 			}
 
-			if (ps.emailVerificationExpiresIn !== undefined) {
-				set.emailVerificationExpiresIn = ps.emailVerificationExpiresIn;
-			}
-
 			if (ps.enableHcaptcha !== undefined) {
 				set.enableHcaptcha = ps.enableHcaptcha;
 			}
diff --git a/packages/backend/src/server/api/endpoints/meta.ts b/packages/backend/src/server/api/endpoints/meta.ts
index 9be0253a2e..2727e4f093 100644
--- a/packages/backend/src/server/api/endpoints/meta.ts
+++ b/packages/backend/src/server/api/endpoints/meta.ts
@@ -100,10 +100,6 @@ export const meta = {
 				type: 'boolean',
 				optional: false, nullable: false,
 			},
-			emailVerificationExpiresIn: {
-				type: 'number',
-				optional: false, nullable: false,
-			},
 			enableHcaptcha: {
 				type: 'boolean',
 				optional: false, nullable: false,
@@ -312,7 +308,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				privacyPolicyUrl: instance.privacyPolicyUrl,
 				disableRegistration: instance.disableRegistration,
 				emailRequiredForSignup: instance.emailRequiredForSignup,
-				emailVerificationExpiresIn: instance.emailVerificationExpiresIn,
 				enableHcaptcha: instance.enableHcaptcha,
 				hcaptchaSiteKey: instance.hcaptchaSiteKey,
 				enableRecaptcha: instance.enableRecaptcha,