diff --git a/packages/backend/migration/1698912474617-enhance-mail-verification.js b/packages/backend/migration/1698912474617-enhance-mail-verification.js
new file mode 100644
index 0000000000..6d2e4b9a55
--- /dev/null
+++ b/packages/backend/migration/1698912474617-enhance-mail-verification.js
@@ -0,0 +1,16 @@
+/*
+ * 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 360239f509..538c4f003d 100644
--- a/packages/backend/src/models/Meta.ts
+++ b/packages/backend/src/models/Meta.ts
@@ -174,6 +174,11 @@ export class MiMeta {
 	})
 	public emailRequiredForSignup: boolean;
 
+	@Column('integer', {
+		default: 0,
+	})
+	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 73c84a8674..4eb8f860d3 100644
--- a/packages/backend/src/server/api/endpoints/admin/meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/meta.ts
@@ -32,6 +32,10 @@ export const meta = {
 				type: 'boolean',
 				optional: false, nullable: false,
 			},
+			emailVerificationExpiresIn: {
+				type: 'number',
+				optional: false, nullable: false,
+			},
 			enableHcaptcha: {
 				type: 'boolean',
 				optional: false, nullable: false,
@@ -353,6 +357,7 @@ 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 c58569a31c..9a520d3dc8 100644
--- a/packages/backend/src/server/api/endpoints/admin/update-meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/update-meta.ts
@@ -59,6 +59,7 @@ 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 },
@@ -249,6 +250,10 @@ 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 2727e4f093..9be0253a2e 100644
--- a/packages/backend/src/server/api/endpoints/meta.ts
+++ b/packages/backend/src/server/api/endpoints/meta.ts
@@ -100,6 +100,10 @@ export const meta = {
 				type: 'boolean',
 				optional: false, nullable: false,
 			},
+			emailVerificationExpiresIn: {
+				type: 'number',
+				optional: false, nullable: false,
+			},
 			enableHcaptcha: {
 				type: 'boolean',
 				optional: false, nullable: false,
@@ -308,6 +312,7 @@ 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,