diff --git a/packages/backend/src/core/CustomEmojiService.ts b/packages/backend/src/core/CustomEmojiService.ts
index 65bc4c6451..51a48aeec4 100644
--- a/packages/backend/src/core/CustomEmojiService.ts
+++ b/packages/backend/src/core/CustomEmojiService.ts
@@ -768,6 +768,9 @@ export class CustomEmojiService {
 }
 
 export class InvalidEmojiError extends Error {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
 	public readonly [isRetryableSymbol] = false;
 }
 
diff --git a/packages/backend/src/misc/captcha-error.ts b/packages/backend/src/misc/captcha-error.ts
index 7da8e386d9..9e91826c81 100644
--- a/packages/backend/src/misc/captcha-error.ts
+++ b/packages/backend/src/misc/captcha-error.ts
@@ -14,6 +14,9 @@ export const captchaErrorCodes = {
 export type CaptchaErrorCode = typeof captchaErrorCodes[keyof typeof captchaErrorCodes];
 
 export class CaptchaError extends Error {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
 	public readonly code: CaptchaErrorCode;
 	public readonly cause?: unknown;
 
diff --git a/packages/backend/src/misc/errors/ConflictError.ts b/packages/backend/src/misc/errors/ConflictError.ts
index b63afb8efe..ecd9919589 100644
--- a/packages/backend/src/misc/errors/ConflictError.ts
+++ b/packages/backend/src/misc/errors/ConflictError.ts
@@ -3,4 +3,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-export class ConflictError extends Error {}
+export class ConflictError extends Error {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+}
diff --git a/packages/backend/src/misc/errors/DisposeError.ts b/packages/backend/src/misc/errors/DisposeError.ts
index bfa4ef218d..a5c154ba5f 100644
--- a/packages/backend/src/misc/errors/DisposeError.ts
+++ b/packages/backend/src/misc/errors/DisposeError.ts
@@ -7,6 +7,9 @@
  * Common base class for DisposedError and DisposingError - please use only for catch() blocks.
  */
 export abstract class DisposeError extends Error {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
 	public readonly source: string | undefined;
 
 	protected constructor(opts?: { source?: string, message?: string }) {
@@ -19,6 +22,9 @@ export abstract class DisposeError extends Error {
  * Thrown when an attempt is made to use an object that has been disposed.
  */
 export class DisposedError extends DisposeError {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
 	constructor(opts?: { source?: string, message?: string }) {
 		super({
 			source: opts?.source,
@@ -31,6 +37,9 @@ export class DisposedError extends DisposeError {
  * Thrown when an object is use begins disposing.
  */
 export class DisposingError extends DisposeError {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
 	constructor(opts?: { source?: string, message?: string }) {
 		super({
 			source: opts?.source,
diff --git a/packages/backend/src/misc/errors/FetchFailedError.ts b/packages/backend/src/misc/errors/FetchFailedError.ts
index d5f8f74abc..c821f0e3b5 100644
--- a/packages/backend/src/misc/errors/FetchFailedError.ts
+++ b/packages/backend/src/misc/errors/FetchFailedError.ts
@@ -4,6 +4,10 @@ import { QuantumCacheError } from '@/misc/errors/QuantumCacheError.js';
  * Thrown when a fetch failed for any reason.
  */
 export class FetchFailedError extends QuantumCacheError {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
+
 	/**
 	 * Name of the key(s) that could not be fetched.
 	 * Will be an array if bulkFetcher() failed, and a string if regular fetch() failed.
diff --git a/packages/backend/src/misc/errors/KeyNotFoundError.ts b/packages/backend/src/misc/errors/KeyNotFoundError.ts
index 52b5a3ddf8..dec84c1dfb 100644
--- a/packages/backend/src/misc/errors/KeyNotFoundError.ts
+++ b/packages/backend/src/misc/errors/KeyNotFoundError.ts
@@ -5,6 +5,9 @@ import { isRetryableSymbol } from '@/misc/is-retryable-error.js';
  * Thrown when a fetch failed because no value was found for the requested key(s).
  */
 export class KeyNotFoundError extends FetchFailedError {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
 	/**
 	 * Missing keys are considered non-retryable, as they won't suddenly appear unless something external creates them.
 	 */
diff --git a/packages/backend/src/misc/errors/QuantumCacheError.ts b/packages/backend/src/misc/errors/QuantumCacheError.ts
index d70331087d..fc329697fa 100644
--- a/packages/backend/src/misc/errors/QuantumCacheError.ts
+++ b/packages/backend/src/misc/errors/QuantumCacheError.ts
@@ -2,6 +2,9 @@
  * Base class for all Quantum Cache errors.
  */
 export class QuantumCacheError extends Error {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
 	/**
 	 * Name of the cache that produced this error.
 	 */
diff --git a/packages/backend/src/misc/fastify-reply-error.ts b/packages/backend/src/misc/fastify-reply-error.ts
index 03109e8b96..885d33fad3 100644
--- a/packages/backend/src/misc/fastify-reply-error.ts
+++ b/packages/backend/src/misc/fastify-reply-error.ts
@@ -5,6 +5,9 @@
 
 // https://www.fastify.io/docs/latest/Reference/Reply/#async-await-and-promises
 export class FastifyReplyError extends Error {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
 	public message: string;
 	public statusCode: number;
 
diff --git a/packages/backend/src/misc/identifiable-error.ts b/packages/backend/src/misc/identifiable-error.ts
index 56e13f2622..9497791ea1 100644
--- a/packages/backend/src/misc/identifiable-error.ts
+++ b/packages/backend/src/misc/identifiable-error.ts
@@ -7,6 +7,9 @@
  * ID付きエラー
  */
 export class IdentifiableError extends Error {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
 	public message: string;
 	public id: string;
 
diff --git a/packages/backend/src/misc/status-error.ts b/packages/backend/src/misc/status-error.ts
index 4fd3bfcafb..815a7686e3 100644
--- a/packages/backend/src/misc/status-error.ts
+++ b/packages/backend/src/misc/status-error.ts
@@ -4,6 +4,9 @@
  */
 
 export class StatusError extends Error {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
 	public statusCode: number;
 	public statusMessage?: string;
 	public isClientError: boolean;
diff --git a/packages/backend/src/server/api/AuthenticateService.ts b/packages/backend/src/server/api/AuthenticateService.ts
index f9bccb638e..2c5615c084 100644
--- a/packages/backend/src/server/api/AuthenticateService.ts
+++ b/packages/backend/src/server/api/AuthenticateService.ts
@@ -18,6 +18,9 @@ import { CacheManagementService, type ManagedMemoryKVCache } from '@/global/Cach
 import { TimeService } from '@/global/TimeService.js';
 
 export class AuthenticationError extends Error {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
 	constructor(message: string) {
 		super(message);
 		this.name = 'AuthenticationError';
diff --git a/packages/backend/src/server/api/error.ts b/packages/backend/src/server/api/error.ts
index 2f8322a568..576f13aeac 100644
--- a/packages/backend/src/server/api/error.ts
+++ b/packages/backend/src/server/api/error.ts
@@ -6,6 +6,9 @@
 type E = { message: string, code: string, id: string, kind?: 'client' | 'server' | 'permission', httpStatusCode?: number };
 
 export class ApiError extends Error {
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
 	public message: string;
 	public code: string;
 	public id: string;
diff --git a/packages/megalodon/src/lib/cancel.ts b/packages/megalodon/src/lib/cancel.ts
index 3b905a492e..cab4c15bb2 100644
--- a/packages/megalodon/src/lib/cancel.ts
+++ b/packages/megalodon/src/lib/cancel.ts
@@ -1,5 +1,8 @@
 export class RequestCanceledError extends Error {
-  public isCancel: boolean
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
+
+	public isCancel: boolean
 
   constructor(msg: string) {
     super(msg)
diff --git a/packages/megalodon/src/lib/megalodon.ts b/packages/megalodon/src/lib/megalodon.ts
index 5bde31ff82..1d3c965e26 100644
--- a/packages/megalodon/src/lib/megalodon.ts
+++ b/packages/megalodon/src/lib/megalodon.ts
@@ -1354,37 +1354,21 @@ export interface MegalodonInterface {
 }
 
 export class NoImplementedError extends Error {
-  constructor(err?: string) {
-    super(err)
-
-    this.name = new.target.name
-    Object.setPrototypeOf(this, new.target.prototype)
-  }
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
 }
 
 export class ArgumentError extends Error {
-  constructor(err?: string) {
-    super(err)
-
-    this.name = new.target.name
-    Object.setPrototypeOf(this, new.target.prototype)
-  }
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
 }
 
 export class UnexpectedError extends Error {
-  constructor(err?: string) {
-    super(err)
-
-    this.name = new.target.name
-    Object.setPrototypeOf(this, new.target.prototype)
-  }
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
 }
 
 export class NodeinfoError extends Error {
-  constructor(err?: string) {
-    super(err)
-
-    this.name = new.target.name
-    Object.setPrototypeOf(this, new.target.prototype)
-  }
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
 }
diff --git a/packages/megalodon/src/lib/notification.ts b/packages/megalodon/src/lib/notification.ts
index 846d79c6d7..342e730da4 100644
--- a/packages/megalodon/src/lib/notification.ts
+++ b/packages/megalodon/src/lib/notification.ts
@@ -13,10 +13,8 @@ export const AdminSignup = 'admin.sign_up' as const;
 export const AdminReport = 'admin.report' as const;
 
 export class UnknownNotificationTypeError extends Error {
-  constructor() {
-    super()
-    Object.setPrototypeOf(this, UnknownNotificationTypeError.prototype)
-  }
+	// Fix the error name in stack traces - https://stackoverflow.com/a/71573071
+	override name = this.constructor.name;
 }
 
 export const notificationTypes = [