Developer Tools

Shisa.AI

Open-source bilingual Japanese-English language models for high-quality translation and local AI development.

shisa.ai

Verified API available

Quick facts
What is it	Open-source bilingual Japanese-English language models for high-quality translation and local AI development.
Pricing	Unknown
Platform	API
API	Yes
Best for	Japanese-English translation development, LLM benchmarking and evaluation
Domain registered	2024

Data updated Aug. 1, 2026

What does Shisa.AI do?

Shisa.AI develops and provides open-source large language models specifically optimized for Japanese-English bilingual tasks. These models are designed to handle translation, text generation, and comprehension in both languages, with a particular focus on achieving high performance in Japanese language benchmarks. The team releases models in various sizes, from compact 1.2B parameter versions for edge computing to massive 405B parameter models for state-of-the-art results, all available for free download and use.

The tool stands out through its specialized benchmarking, like the JP-TL-Bench, which provides directional scores to evaluate translation quality from Japanese to English versus English to Japanese separately. This granular analysis helps developers understand model performance nuances that generic benchmarks miss. The models are built on architectures like Llama and are fine-tuned with extensive Japanese data, often outperforming other open-source models in specific Japanese language tasks.

This tool is most valuable for developers and researchers working on Japanese language AI applications, machine translation systems, and local AI deployment within Japan. Use cases include integrating high-quality Japanese language support into applications, developing specialized translation tools for businesses, and academic research on bilingual language models without relying on proprietary API services.

AI inference App Localization Developer Tools LLM

#ai models#bilingual-models#japanese-llm#language models#open source#translation-benchmark#translation-evaluation

Key features

What makes it stand out

Open-source bilingual Japanese-English language models

Directional translation evaluation with JP-TL-Bench

Multiple model sizes from 1.2B to 405B parameters

Optimized for Japanese language performance

Free download and use for development

Who is Shisa.AI for?

Who benefits most from this tool

Japanese-English translation development

LLM benchmarking and evaluation

Bilingual AI model deployment

Trust & presence

Domain Domain registered 2024

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