SUPERTONIC-3 • Japanese

Japanese text to speech

Model: Supertonic-3 Acoustic Rate: 24 kHz Audio Containers: WAV / OGG Request Limit: 2,000 chars Script: Japanese alphabet

Japanese text to speech on Qefro Voice Studio uses one voice from Supertonic-3. Paste Japanese text, generate, then download WAV, or OGG when the engine has ffmpeg. Speed and pitch are not available. Gujarati, Odia, and Urdu are separate languages this engine does not speak.

Try a Japanese line

こんにちは。Qefro Voice Studio へようこそ。この長めの文章は、短いあいさつだけではありません。文と文の間の間、言葉の重さ、終わりの調子がどう聞こえるかを確かめるための、小さな場面です。朝の市場はゆっくり目を覚ましていました。店の人は新しい花を並べ、お茶の香りが路地に出て、子どもたちは学校の前に一度振り返りました。良い声は、これらの絵を急いで話しません。聞いたあと、言葉を少し変えて、もう一度長い文章を作ってみてください。朝の光が店先に落ち、人の話し声が少しずつ増えていきました。

Open Studio with Japanese Voice

Real-world Japanese voiceover scenarios

Tested production scripts for reels, tutorials, announcements, and telephony:

Social Reel Voiceover

Japanese video narration hook

こんにちは。Qefro Voice Studio へようこそ。この長めの文章は、短いあいさつだけではありません。文と文の間の間、言葉の重さ、終わりの調子がどう聞こえるかを確かめるための、小さな場面です。朝の市場はゆっくり目を覚ましていました…

Context / Translation: Introductory narration sample for Japanese short-form video content.

Explainer & Tutorial

Japanese instructional walkthrough

Context / Translation: Extended paragraph demonstrating sentence pauses and rhythm in Japanese.

Store & Promo Announcement

Japanese commercial announcement

こんにちは。Qefro Voice Studio へようこそ。この長めの文章は、短いあいさつだけではありません。文と文の間の間、言葉の重さ、終わりの調子がどう聞こえるかを確かめるための、小さな場面です。朝の市場はゆっくり目を覚ましていました。店の人は新しい花を並べ、お茶の香りが路地に出て、子どもたち…

Context / Translation: Promotional broadcast sample in Japanese.

Customer Care & IVR

Japanese phone system greeting

こんにちは。Qefro Voice Studio へようこそ。この長めの文章は、短いあいさつだけではありません。文と文の間の間、言葉の重さ、終わりの調子がどう聞こえるかを確かめるた…

Context / Translation: Customer service telephony greeting in Japanese.

Linguistic notes & pronunciation considerations

Japanese text to speech is synthesized using the Supertonic-3 neural model with neutral acoustic cadence. The engine respects native punctuation pauses, sentence-final intonation, and syllable cadence. Punctuation marks such as commas, full stops, and question marks dictate realistic pauses and pitch inflection.

How Japanese speech is made

Open the studio with Japanese selected.
Paste your Japanese script. The engine limit is 2,000 characters per request.
Click Generate voiceover and download the audio file directly in your browser.

Developer API cURL snippet

Automate Japanese voiceover generation directly in your application backend:

curl -X POST https://voice.qefro.com/api/v1/tts   -H "Authorization: Bearer YOUR_API_KEY"   -H "Content-Type: application/json"   -d '{"text": "こんにちは。Qefro Voice Studio へようこそ。この長めの文章は、短いあいさつだけではありません。文と文の間の間、言葉の重さ、終わりの調子がどう聞こえるかを確かめるための、小さな場面です。朝の市場はゆっくり目を覚ましていました…", "lang": "ja", "format": "wav"}'   --output voiceover.wav

Frequently asked questions about Japanese TTS

Which neural model generates Japanese speech?

Japanese text to speech is powered by the Supertonic-3 model on the Qefro TTS microservice.

What audio containers can I download for Japanese?

You can download lossless 16-bit PCM WAV audio and compressed OGG Vorbis audio directly in your browser or through the API.

What is the character limit for Japanese conversion?

Up to 500 characters per conversion for guests, and up to 2,000 characters per request for registered accounts and API callers.

Can I automate Japanese voiceover creation with code?

Yes. An active API plan provides a Bearer token for POST https://voice.qefro.com/api/v1/tts returning WAV or OGG audio.

Other supported languages

Indic neural voices (VITS • 24 kHz)

Assamese Bengali Bodo Dogri Kannada Maithili Malayalam Marathi Nepali Punjabi Sanskrit Tamil Telugu

Global neural voices (Supertonic-3)

Arabic Bulgarian Croatian Czech Danish Dutch English Estonian Finnish French German Greek Hindi Hungarian Indonesian Italian Korean Latvian Lithuanian Polish Portuguese Romanian Russian Slovak Slovenian Spanish Swedish Turkish Ukrainian Vietnamese