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Persian to Japanese speech translation API

Stream Persian (فارسی) speech and get Japanese (日本語) back in real time. One WebSocket, ISO codes fa to ja, and ultra-low latency for voice agents and live apps.

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Production-ready Persian to Japanese translation API

Real Persian speech includes accents, regional dialects, code switching, and domain-specific vocabulary. Soniox recognizes it in a single model and streams Japanese while the speaker is still talking.

Persian (Indo-European > Iranian > Western Iranian) and Japanese (Japonic) come from different language families, so word order and morphology differ. Soniox reorders meaning in-stream instead of word by word.

Persian is written in Arabic and Japanese in CJK, so Soniox emits correctly scripted Japanese text. Right-to-left output is handled directly in the token stream.

A breakthrough in real-time Persian to Japanese translation

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Translate before the sentence ends

Japanese meaning lands as Persian is spoken, not after the caption catches up.

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Directional fa to ja streaming

Set the source and target codes once. Both arrive in a single labeled token stream.

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High quality Japanese output

Same model across every language, including historically underserved ones.

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Native-speaker Persian STT accuracy

Accurate Japanese translation starts with accurate Persian recognition across accents and language switching.

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Names, numbers, and domain terms

Preserved across the pair, including phone numbers, emails, and IDs.

config.json
{
  "model": "stt-rt-v4",
  "translation": {
    "type": "one_way",
    "source_language": "fa",
    "target_language": "ja"
  }
}

Persian and Japanese through a single stream

Persian to Japanese translation is built on top of Soniox Speech-to-Text API. Every spoken word is transcribed, and Japanese translation streams mid-sentence in the same labeled token stream.

Turn it on by adding a translation block with source_language: "fa" and target_language: "ja". It runs on the same WebSocket and the same model, with no extra round trip.

Live Persian to Japanese: written and spoken

Persian to Japanese speech-to-text

micLive Persian speecharrow_right_altsubjectJapanese text

Translate live Persian into written Japanese with the Soniox STT API. Soniox streams the Persian transcript and the Japanese translation as speech happens.

Use it for Japanese captions, subtitles, meeting translation, agent assist, and multilingual transcription.

Persian to Japanese speech-to-speech

micLive Persian speecharrow_right_altvolume_upSpoken Japanese

Build full spoken Persian to Japanese translation by combining Soniox STT and Soniox TTS. Soniox recognizes Persian, translates it, and speaks Japanese with low latency.

Use it for live interpreters, bilingual voice agents, travel assistants, and customer support.

Live Persian to Japanese translation in action

Stream Persian to Japanese one-way to push all speech into Japanese, or two-way to keep a bilingual conversation flowing between the two languages.

voice_selection
Persian speaker says: “فقط من یه meeting آنلاین ساعت چهار دارم؛ اگه زودتر بریم، OK ام.”
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Translated into Japanese in real time.

One-way translation

Translate live Persian into Japanese. Everyone in the conversation sees the same translated stream.

Ideal for live captions, multilingual meetings, broadcasts, lectures, and customer calls.

voice_selection
Persian speaker talks in Persian.
hearing
Japanese speaker hears Japanese.
voice_selection
Japanese speaker replies in Japanese.
hearing
Persian speaker hears Persian.

Two-way translation

Translate between Persian and Japanese for live bilingual conversation. Each side speaks naturally and hears the other in their own language.

Soniox supports real-time two-way translation between any two of 60+ supported languages.

Accurate on both ends of the pair

Soniox transcribes Persian at 10.9% word error rate and Japanese at 8.7% word error rate. Accurate recognition on both sides is what makes the translation reliable.

speech_to_text

Speech-to-Text

Native-speaker accuracy across 60+ languages, with support for multilingual speech, alphanumerics, speaker diarization, context.

translate

Translation

Real-time streaming translation across 3,600 language pairs, built for high quality and low delay across all supported languages.

text_to_speech

Text-to-speech

High-fidelity speech generation in 60+ languages, built for names, alphanumerics, language switching, and ultra-low-latency streaming.

Together, they create a complete real-time low-latency speech AI platform.

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About Persian and Japanese

Persian has roughly 110,000,000 speakers across Iran, Afghanistan, and Tajikistan. Japanese has roughly 125,000,000 speakers across Japan.

Persian is one of the world's oldest literary languages, with a written tradition spanning over 2,500 years.

Japanese uses three writing systems simultaneously: kanji (Chinese characters), hiragana, and katakana.

Soniox makes Persian to Japanese usable in real-time translation across every supported pair.

Translate Persian to any language

From Persian to Japanese, or Persian to any of 60+ supported languages. All real-time.

AfrikaansAlbanianArabicAzerbaijaniBasqueBelarusianBengaliBosnianBulgarianCatalanChineseCroatianCzechDanishDutchEnglishEstonianFinnishFrenchGalicianGermanGreekGujaratiHebrewHindiHungarianIndonesianItalianJapaneseKannadaKazakhKoreanLatvianLithuanianMacedonianMalayMalayalamMarathiNorwegianPolishPortuguesePunjabiRomanianRussianSerbianSlovakSlovenianSpanishSwahiliSwedishTagalogTamilTeluguThaiTurkishUkrainianUrduVietnameseWelsh

Related translation pages

swap_horizTranslate Japanese to Persianarrow_right_alttranslatePersian speech translationarrow_right_alttranslateJapanese speech translationarrow_right_alt

Frequently asked questions

How do I translate Persian to Japanese with the API?arrow_downward
Add a translation block to your real-time request with source_language "fa" and target_language "ja". Soniox transcribes Persian and streams the Japanese translation over the same WebSocket.
Is Persian to Japanese translation real-time?arrow_downward
Yes. Soniox streams Japanese while Persian is still being spoken, so meaning arrives mid-sentence instead of after the sentence ends.
What about translating Japanese to Persian?arrow_downward
That direction is supported too. See the Japanese to Persian page, or use two-way translation to run both directions in one session.
Does Soniox handle Arabic to CJK output?arrow_downward
Yes. Soniox outputs correctly scripted Japanese text in CJK, including right-to-left rendering, directly in the token stream.
Does Soniox handle Persian dialects and accents?arrow_downward
Yes. Soniox handles Persian dialects like Iranian Persian, Dari (Afghanistan), and Tajik (Tajikistan) in a single model, so Japanese translation stays accurate across regions.
Which other providers support Persian to Japanese?arrow_downward
Based on their public docs, OpenAI, Google, and Azure list both Persian and Japanese for real-time translation. Soniox is the only one that also supports two-way live translation across 60+ languages.
How fast is Persian to Japanese translation?arrow_downward
Soniox streams Japanese as Persian is being spoken, with ultra-low latency. Translation arrives before the sentence ends.

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