Best AI Infrastructure Companies in Japan
The 53 best AI Infrastructure companies in Japan in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Sakana.
- Valuates Reports
- MarketsandMarkets
Our analysis of 50 AI Infrastructure companies
$46.6b in tracked funding; 98% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best AI Infrastructure companies in Japan
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Web popularity | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Sakana 🦄 Provider of AI research laboratory services | $344M | 3 mo ago | — | Alex Yu Co-Founder & COO | VarnishGitHub Pagescore-js+6 | Top 1M | — | 2 job openings · 2 launchs |
| 2 | Preferred Infrastructure 🦄 Developer of AI infrastructure, foundation models, and product solutions | $125M | 14 mo ago | 205 | Daisuke Okanohara Co-Founder | WordPressMySQLPHP+19 | Top 5M | — | — |
| 3 | Stockmark Developer of AI solutions for text data analysis and utilization | $59M | 20 mo ago | 54 | Kosuke Arima Co-Founder Cto | WordPressApple iCloud MailGoogle Workspace+29 | Top 1M | — | — |
| 4 | Aiand Developer of artificial intelligence platform, frontier models, and optimized compute infrastructure | $50M | 3 mo ago | — | Shimpei Hara Co-Founder | Framer SitesReactPriority Hints+6 | Top 10M | — | — |
| 5 | LeapMind Provider of deep learning and compression solution | $46M | 81 mo ago | 46 | — | — | — | 43 patents Hardware-accelerated neural network inference and training for edge AI image processing | — |
| 6 | Midokura Open source edge platform providing network virtualization solution | $45M | 121 mo ago | 80 | — | WordPressMySQLPHP+27 | Top 50M | — | 1 partnership |
| 7 | Cogent Developer of artificial intelligence solutions for data extraction and document processing | $36M | 33 mo ago | 47 | Eric Whiteway Founder & CEO | WordPressMySQLPHP+26 | Top 10M | — | 1 launch |
| 8 | EdgeCortix Developer of energy-efficient AI processors, accelerators, modules, cards, and systems | $28M | 3 mo ago | 37 | Sakya Dasgupta Founder & CEO | HubSpot CMS HubHubSpotcore-js+16 | Top 5M | 15 patents Patents concentrated in computing, sensing & instrumentation | — |
| 9 | Fairy Devices Enterprise solutions for remote working and assistance for industrial field workers | $25M | 37 mo ago | 16 | — | Node.jsNext.jsReact+14 | Top 10M | 80 patents Real-time session management and image processing for networked communication devices | 1 award |
| 10 | Fronteo Provider of AI solutions for legal, life science, and business | $22M | 115 mo ago | 297 | — | WordPressApple iCloud MailMicrosoft 365+35 | Top 5M | 117 patents Computational biology platforms for pathway analysis, target search, and similarity indexing | — |
| 11 | Fast Label Provider of an AI-based annotation platform | $22M | 15 mo ago | 13 | — | STUDIOApple iCloud MailGoogle Workspace+16 | Top 5M | — | — |
| 12 | Ubitus Provider of cloud gaming, metaverse streaming, and artificial intelligence solutions | $17M | 16 mo ago | 117 | — | WordPressMySQLPHP+15 | Top 10M | 19 patents AI-driven media compression, quality enhancement, and game bot training technologies. | — |
| 13 | Kotoba Technologies Platform that provides translation and speech-to-text solutions | $12M | 12 mo ago | — | Noriyuki Kojima CO-Founder & CEO | Cart FunctionalitySquarespace CommerceSquarespace+15 | Top 5M | — | 3 job openings · 2 partnerships |
| 14 | EDGEMATRIX Developer of edge AI-based video surveillance solutions for smart cities | $9M | 82 mo ago | 14 | — | NginxAmazon Web Servicescore-js+8 | Top 50M | — | — |
| 15 | ArchiTek Provider of AI-enabled vision processing unit system for multiple industries | $5M | 49 mo ago | 15 | Hassan Toorabally Managing Director | WordPressMySQLPHP+16 | Top 50M | 6 patents Edge computing hardware and parallel processing architectures for SIMD and vector operations | — |
| 16 | Citadel AI Software products and services to test, and monitor the quality and reliability of AI systems | $5M | 36 mo ago | — | Kenny Song Co-Founder | WordPressMySQLPHP+20 | Top 10M | 6 patents AI-driven data processing and machine learning inference acceleration hardware/software | — |
| 17 | Citadel AI Provider of ML model monitoring platform for enterprises | $5M | 36 mo ago | 12 | Kenny Song Co-Founder & CTO | — | — | 6 patents AI-driven machine learning inference and data processing hardware/software solutions | — |
| 18 | Ecumenopolis Developer of general-purpose conversational AI agent | $3M | 16 mo ago | — | Keita Miyamura Co-Founder | — | — | — | — |
| 19 | Studio Ousia Platform to improve customer targeting and recommendation using natural language processing | $3M | 113 mo ago | 9 | — | — | — | — | — |
| 20 | Poetics Provider of solutions to create conversational AI with algorithms and machine learning | $3M | 21 mo ago | 15 | Hazumu Yamazaki Co-Founder & Co-CEO | WebflowApple iCloud MailGoogle Workspace+24 | Top 5M | — | — |
| 21 | Almure Developer of confidential computing technology for secure enterprise AI agents | $1M | 3 mo ago | — | Atsuki Momose Founder & CEO | — | — | — | — |
| 22 | GAZAI Platform offering AI-powered tools to analyze, generate, and automate insights from visual and multimedia… | $697K | 22 mo ago | — | Takuya Kanda Co-Founder | STUDIOApple iCloud MailGoogle Workspace+11 | Top 50M | — | — |
| 23 | miibo AI construction platform developing conversational AI bots | $408K | 31 mo ago | — | Masashi Kuto CEO | — | — | — | — |
| 24 | Data Grid Provider of solutions for creating digital content using AI | $359K | 55 mo ago | 13 | Yuki Okada CEO | — | — | — | — |
Top 12 AI Infrastructure companies in Japan
#1
Sakana 🦄Series B · Tokyo, Tokyo · founded 2023$344Mraised▾
Sakana AI is a Tokyo-based R&D company founded by former Google AI engineers, David Ha and Llion Jones. Inspired by nature, Sakana AI aims to design collective artificial intelligence models.
- Mar 2026Series B—
- Feb 2026Series B—
- Jan 2026Series B—
- Nov 2025Series B$135M
#2
Seed · Yokohama, Kanagawa · founded 2026$50Mraised▾
Developer of artificial intelligence platform, frontier models, and optimized compute infrastructure. The company builds continual learning, developing models across language, video, and multimodal domains. Post-training focuses on enterprise deployment with attention to security and performance. The company builds infrastructure to scale artificial intelligence.
- Mar 2026Seed$50M
#3
Series B · Chuo, Tokyo · founded 2019 · 37 employees$28Mraised▾
Developer of energy-efficient AI processors, accelerators, modules, cards, and systems. The company offers a software platform facilitating AI inference across heterogeneous systems. Its technology includes a reconfigurable, highly-parallelized architecture. The company's products handle vision tasks and large language models in low-power environments.
- Apr 2026Series B—
- Nov 2025Series B$110M
- Aug 2025Series B—
- Jun 2025Grant (prize money)$21M
#4
Series D · Tokyo, Tokyo · founded 2014 · 205 employees$124.9Mraised▾
Developer of AI infrastructure, foundation models, and product solutions. The company develops AI semiconductors, computing infrastructure, generative AI models, and AI product solutions. It researches and develops new technologies, applying them across industries. The company provides AI products and solutions for various sectors.
- Apr 2025Conventional Debt—
- Apr 2025Series D$35.1M
- Dec 2024Conventional Debt—
- Dec 2024Series D$120.8M
#5
Seed · Tokyo, Tokyo · founded 2026$1.3Mraised▾
Developer of confidential computing technology for secure enterprise AI agents. This technology provides security for data processing within artificial intelligence systems. It enables the execution of workloads while maintaining strict data protection standards. The platform facilitates the integration of sensitive information into automated processes by ensuring cryptographic security during computation.
- Apr 2026Seed$1.3M
#6
Series B · Shinagawa, Tokyo · founded 2020 · 13 employees$22Mraised▾
Provider of an AI-based annotation platform. It provides multiple annotation solutions that include images and videos, rectangles and segmentations, and key points. It also provides visualization, data analysis, collaboration, and extraction solutions. It has use cases for drones, robotics, self-driving cars, construction, sports, and medical applications.
- Mar 2025Conventional Debt$1.3M
- Sep 2024Series B$2.1M
- Sep 2024Series B$8.7M
- Nov 2023Series B$7.8M
#7
Seed · Chiyoda City, Tokyo · founded 2023$11.8Mraised▾
Platform that provides translation and speech-to-text solutions. It is a developer of speech AI technologies, including translation and speech-to-text. It offers end-to-end voice translation, dubbing, voice cloning, and speech generation. The company develops high-speed ASR models and provides bilingual versions with end-to-end bidirectional voice-to-text translation.
- Jun 2025Seed$11.8M
#8
Series D · Minato City, Tokyo · founded 2016 · 54 employees$58.8Mraised▾
Developer of AI solutions for text data analysis and utilization. The company provides tools for transforming organizational text data into actionable insights. These solutions support decision-making and aim to enhance business processes. The company offers services including AI implementation and customized AI agent development.
- Oct 2024Series D$30.1M
- Aug 2022Seed—
- Mar 2021Seed—
#9
Series D · Tokyo, Tokyo · founded 2007 · 117 employees$17Mraised▾
Provider of cloud gaming, metaverse streaming, and artificial intelligence solutions. The company offers GPU virtualization technology and a cloud streaming platform. It converts titles to cloud versions for customized cloud gaming platforms. The company provides support for AI applications, including deployment of large language models and training of drawing models.
- Feb 2025Series D—
- Mar 2024Series D—
- Mar 2021Series C—
- May 2013Series B$15M
#10
Seed · Shinjuku City, Tokyo · founded 2022$3.3Mraised▾
Developer of general-purpose conversational AI agent
- Mar 2025Seed$1.7M
- Aug 2024Seed—
- Aug 2022Seed$3.3M
#11
Series A · Shibuya, Tokyo · founded 2017 · 15 employees$3Mraised▾
Provider of solutions to create conversational AI with algorithms and machine learning. It analyzes human emotions through voice and uses sound features to determine the fluctuation of emotions.
- Oct 2024Series A—
- Jan 2023Series A—
- Jul 2018Series A$3M
#12
Series D · Shibuya, Tokyo · founded 2014 · 47 employees$35.6Mraised▾
Developer of artificial intelligence solutions for data extraction and document processing. The company provides services for automating complex tasks and managing information. These services include optical character recognition, data quality control by professional operators, and document digitization. The company also offers digital storage solutions for data access, organization, and sharing.
- Oct 2023Series D—
- Apr 2020Series C$13M
- May 2019Series B$11M
- Feb 2017Series A$11.6M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of AI Infrastructure coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on AI Chips & Accelerators is moving in Japan
A read on the academic research around AI Chips & Accelerators — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 48 Japan-affiliated papers.
- Korea University8
- Hitachi4
- Tokyo Institute of Technology3
- The University of Tokyo3
- Renesas Electronics3
- CMOS6
- Artificial neural network5
- Computer hardware4
- Overhead (engineering)4
- Static random-access memory3
- Optoelectronics4
- Resistive random-access memory3
- Photonics2
- Atomic layer deposition2
- Dielectric2
- Photonics1
- Application-specific integrated circuit1
- Electronics1
- Context (archaeology)1
- Photonic integrated circuit1
Where ai accelerators is researched across Japan
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Who's filing ai accelerators patents in Japan
Japan ai accelerators patent filing is accelerating — 21,026 filings from 1,656 assignees (2016–2025), led by Fujitsu, NEC, Nippon Telegraph & Telephone; annual filings 133→2776.
- Fujitsu1917
- NEC1392
- Nippon Telegraph & Telephone1297
- Mitsubishi Electric1021
- Canon KK1020
- SONY Group995
- SONY884
- Toyota734
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.