diff --git a/src/index.ts b/src/index.ts
index b26a1e8..77d3f65 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,18 +1,30 @@
 import * as KanjidicImpl from './sources/kanjidic';
-import * as JmdictImpl from './sources/jmdict';
+import * as JMdictImpl from './sources/jmdict';
+import * as JMnedictImpl from './sources/jmnedict';
+import * as RadKFileImpl from './sources/radkfile';
+import * as KRadFileImpl from './sources/kradfile';
 
 const SUPPORTED_SOURCES = [
   KanjidicImpl,
-  JmdictImpl,
+  JMdictImpl,
+  JMnedictImpl,
+  RadKFileImpl,
+  KRadFileImpl,
 ] as const;
 
 export type CreateDownloaderParams = (
   KanjidicImpl.CreateDownloaderParams
-  | JmdictImpl.CreateDownloaderParams
+  | JMdictImpl.CreateDownloaderParams
+  | JMnedictImpl.CreateDownloaderParams
+  | RadKFileImpl.CreateDownloaderParams
+  | KRadFileImpl.CreateDownloaderParams
 );
 
 export * as Kanjidic from './sources/kanjidic';
-export * as Jmdict from './sources/jmdict';
+export * as JMdict from './sources/jmdict';
+export * as JMnedict from './sources/jmnedict';
+export * as RadKFile from './sources/radkfile';
+export * as KRadFile from './sources/kradfile';
 export * from './streams';
 
 export const createDownloader = (params: CreateDownloaderParams) => {
diff --git a/src/sources/jmnedict/common.ts b/src/sources/jmnedict/common.ts
new file mode 100644
index 0000000..0a1b4d2
--- /dev/null
+++ b/src/sources/jmnedict/common.ts
@@ -0,0 +1 @@
+export const SOURCE_ID = 'jmnedict' as const;
diff --git a/src/sources/jmnedict/downloader.ts b/src/sources/jmnedict/downloader.ts
new file mode 100644
index 0000000..da322e4
--- /dev/null
+++ b/src/sources/jmnedict/downloader.ts
@@ -0,0 +1,25 @@
+import fetchPonyfill from 'fetch-ponyfill';
+import { PassThrough } from 'stream';
+import { createGunzip } from 'zlib';
+import { SOURCE_ID } from './common';
+
+export interface CreateDownloaderParams {
+  type: typeof SOURCE_ID;
+  url?: string;
+}
+
+const DEFAULT_SOURCE_URL = 'http://ftp.edrdg.org/pub/Nihongo/JMnedict.xml.gz' as const;
+
+export const createDownloader = async (params: Omit<CreateDownloaderParams, 'type'>) => {
+  const { url = DEFAULT_SOURCE_URL } = params;
+  const { fetch } = fetchPonyfill();
+
+  const response = await fetch(url);
+  if (!response.ok) {
+    throw new Error(`Failed to download: ${url}`);
+  }
+
+  const rawStream = response.body as unknown as PassThrough;
+  return rawStream
+    .pipe(createGunzip());
+};
diff --git a/src/sources/jmnedict/index.ts b/src/sources/jmnedict/index.ts
new file mode 100644
index 0000000..22fa288
--- /dev/null
+++ b/src/sources/jmnedict/index.ts
@@ -0,0 +1,2 @@
+export * from './common';
+export * from './downloader';
diff --git a/src/sources/kradfile/common.ts b/src/sources/kradfile/common.ts
new file mode 100644
index 0000000..fb029ca
--- /dev/null
+++ b/src/sources/kradfile/common.ts
@@ -0,0 +1 @@
+export const SOURCE_ID = 'kradfile' as const;
diff --git a/src/sources/kradfile/downloader.ts b/src/sources/kradfile/downloader.ts
new file mode 100644
index 0000000..33040af
--- /dev/null
+++ b/src/sources/kradfile/downloader.ts
@@ -0,0 +1,25 @@
+import fetchPonyfill from 'fetch-ponyfill';
+import { PassThrough } from 'stream';
+import { createGunzip } from 'zlib';
+import { SOURCE_ID } from './common';
+
+export interface CreateDownloaderParams {
+  type: typeof SOURCE_ID;
+  url?: string;
+}
+
+const DEFAULT_SOURCE_URL = 'http://ftp.edrdg.org/pub/Nihongo/kradfile.gz' as const;
+
+export const createDownloader = async (params: Omit<CreateDownloaderParams, 'type'>) => {
+  const { url = DEFAULT_SOURCE_URL } = params;
+  const { fetch } = fetchPonyfill();
+
+  const response = await fetch(url);
+  if (!response.ok) {
+    throw new Error(`Failed to download: ${url}`);
+  }
+
+  const rawStream = response.body as unknown as PassThrough;
+  return rawStream
+    .pipe(createGunzip());
+};
diff --git a/src/sources/kradfile/index.ts b/src/sources/kradfile/index.ts
new file mode 100644
index 0000000..22fa288
--- /dev/null
+++ b/src/sources/kradfile/index.ts
@@ -0,0 +1,2 @@
+export * from './common';
+export * from './downloader';
diff --git a/src/sources/radkfile/common.ts b/src/sources/radkfile/common.ts
new file mode 100644
index 0000000..94209ac
--- /dev/null
+++ b/src/sources/radkfile/common.ts
@@ -0,0 +1 @@
+export const SOURCE_ID = 'radkfile' as const;
diff --git a/src/sources/radkfile/downloader.ts b/src/sources/radkfile/downloader.ts
new file mode 100644
index 0000000..fe0185f
--- /dev/null
+++ b/src/sources/radkfile/downloader.ts
@@ -0,0 +1,25 @@
+import fetchPonyfill from 'fetch-ponyfill';
+import { PassThrough } from 'stream';
+import { createGunzip } from 'zlib';
+import { SOURCE_ID } from './common';
+
+export interface CreateDownloaderParams {
+  type: typeof SOURCE_ID;
+  url?: string;
+}
+
+const DEFAULT_SOURCE_URL = 'http://ftp.edrdg.org/pub/Nihongo/radkfile.gz' as const;
+
+export const createDownloader = async (params: Omit<CreateDownloaderParams, 'type'>) => {
+  const { url = DEFAULT_SOURCE_URL } = params;
+  const { fetch } = fetchPonyfill();
+
+  const response = await fetch(url);
+  if (!response.ok) {
+    throw new Error(`Failed to download: ${url}`);
+  }
+
+  const rawStream = response.body as unknown as PassThrough;
+  return rawStream
+    .pipe(createGunzip());
+};
diff --git a/src/sources/radkfile/index.ts b/src/sources/radkfile/index.ts
new file mode 100644
index 0000000..22fa288
--- /dev/null
+++ b/src/sources/radkfile/index.ts
@@ -0,0 +1,2 @@
+export * from './common';
+export * from './downloader';
diff --git a/test/index.test.ts b/test/index.test.ts
index b36868b..e75377e 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -1,6 +1,6 @@
 import { createReadStream, createWriteStream } from 'fs';
 import { describe, it, expect } from 'vitest';
-import { createDownloader, Kanjidic, Jmdict, createXmlToJsonLines } from '../src';
+import { createDownloader, Kanjidic, JMdict, createXmlToJsonLines } from '../src';
 
 describe('downloader', () => {
   describe.skip('kanjidic', () => {
@@ -40,7 +40,7 @@ describe('downloader', () => {
   describe.skip('jmdict', () => {
     it('works', async () => {
       const readStream = await createDownloader({
-        type: Jmdict.SOURCE_ID,
+        type: JMdict.SOURCE_ID,
       });
 
       return new Promise<void>((resolve) => {