Shisa Platform
Enterprise APIs: Translation, TTS, ASR, ShisaLLM
Translation, TTS, and ASR APIs — purpose-built for Japanese and the languages it lives alongside.
Shisa.AI builds translation, speech, and language models tuned for Japanese. Power your product with APIs and open-weight models built Japanese-first.
Voice Input
ASR
LLM / Translate
Agent Reasoning
Speech
TTS
My App
JA
営業利益は前年比15％伸長。
EN
Operating profit up 15% YoY.
Solutions for your Business.
Chotto
Consumer chat app. Intuitive AI for Japan conversational AI
A bilingual AI chat assistant built for Japanese context, nuance, and business etiquette.
Shisa LLM
Open-source models, papers, benchmarks
Our family of open-weight Japanese language models, released so the whole ecosystem can build on Japanese-fluent AI.
Latest from Shisa
Shisa AI Launches High-Accuracy, Ultra-Low-Latency Real-Time Speech Recognition API
A real-time speech recognition API combining high accuracy with ultra-low latency.
Read moreShisa AI Releases New Benchmark “COSPA”
A new benchmark for measuring the cost of solving programming assignments.
Read moreShisa Model Use Cases Now Available
Discover how Shisa models are being used in a nuclear engineering design documentation agent and a multilingual multi-agent system.
Read moreResearch & open models
Models
Introducing Shisa V2
A fresh Japanese-first open-weight LLM family covering 7B, 14B, and 70B parameter tiers, with honest benchmarks and the training recipes behind them.
Read on blog.shisa.ai ModelsShisa V2 405B: scaling up without leaving Japanese behind
What changed at frontier scale — dataset composition, tokenizer tweaks, and eval lessons from our biggest model yet.
Read on blog.shisa.ai InfraTuning vLLM for AMD MI300X
A pragmatic walkthrough of getting high-throughput Japanese-language serving on MI300X, including the kernel knobs that actually moved the needle.
Read on blog.shisa.aiReady to ship Japanese-fluent AI?
Get an API key, pilot Chotto inside your team, or partner with us on a custom model. We're happy to help you figure out the right fit.