Arinko Co., Ltd.
Category: AI Infrastructure
Japanese developer of fully-local, offline AI knowledge/RAG apps (Anthole, AntNest, Anthill) for organizations barred from cloud AI. Arinko Co., Ltd. was founded in 2021. The company is led by Yukihiro Hemmi (逸見行宏). Based in Kawachinagano (HQ) / Sakai (office), Osaka, Japan. Team size: 1-10. Latest round: Bootstrapped.
- Founded
- 2021
- Headquarters
- Kawachinagano (HQ) / Sakai (office), Osaka, Japan
- Team size
- 1-10
Value proposition
Lets organizations and individuals use AI on their own documents without sending data to the cloud — a one-time-purchase local knowledge app that bundles the AI model and automates setup, so no data ever leaves the PC.
Products and solutions
Ant series: Anthole (individual, fully-local AI knowledge app, ¥12,800 one-time, macOS/Windows), AntNest (small-team on-prem appliance), Anthill (enterprise-scale on-prem knowledge search platform), AntFeed (document preparation service), AntPost (on-prem email platform), AntPatrol (E2E regression testing service), AntLaunch (fixed-price ¥800,000 excl. tax AI-assisted iOS/Android app development, store submission included). Also custom RAG system development.
Unique value
"No transmission path" (not just "no transmission") — data storage and search complete entirely on the local PC with no open ports, works offline; one-button setup for ChatGPT/Claude integration; all components (AI model, runtime) bundled, no Python/Ollama/API keys required.
Target customer
Government/public agencies, healthcare, legal, finance, and R&D organizations barred from uploading data to cloud AI; also privacy-conscious individuals.
Industries served
Government/public sector, healthcare, legal, finance, R&D, general enterprise DX/IT consulting.
Technology advantage
Fully-local RAG (Retrieval-Augmented Generation) with bundled AI model; automated one-click configuration of major AI apps (ChatGPT, Claude); published measured retrieval accuracy (~80% first-hit on 80 questions, ~0.05s search); supports Word/Excel/PPT/PDF/Markdown via drag-and-drop.
How they differentiate
Differentiates on security (no external transmission path, works fully offline) and ease of use (one-click setup vs. manual JSON config editing), targeting buyers legally barred from cloud AI.
Main competitors
Local/on-prem RAG and knowledge-management tools (e.g., Ollama-based DIY setups, enterprise on-prem RAG platforms), cloud knowledge-base AI tools (Notion AI, Glean) that Arinko positions against for security-constrained buyers.
Major milestones
Founded March 2021, launched Anthole fully-local AI knowledge app on 2026-08-18 (¥12,800 one-time, macOS/Windows), launched AntLaunch fixed-price mobile app development service on 2026-08-18 (¥800,000 excl. tax, iOS/Android), expanded Ant series to include AntNest, Anthill, AntFeed, AntPost, AntPatrol.
Market positioning
Niche player in the Japanese local/on-premise AI knowledge management market, focused on government, healthcare, and legal sectors with strict data-security requirements.
Geographic focus
Japan (Osaka-based; serves domestic government, healthcare, legal, finance buyers).
About Yukihiro Hemmi (逸見行宏)
IT consultant with extensive experience in IT/DX projects; founded Arinko in 2021. Background in computer science.
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Official website: https://arinko.jp
