Japan, Tokyo Weekly Tech Event Digest [`25 Sep 29 - Oct 5]

Hello, tech and startup enthusiasts! Hope you’re having a great week. Here’s a list of upcoming tech events in Japan for the week of September 29 - October 5. Whether you’re into coding, AI, startups, or just looking to network, there’s something for everyone. Check out the details below and mark your calendars!

Events

Monday, September 29

• Dynamical Systems Learning Team Workshop | 🕐 13:00 | Nihonbashi Aip Center, Tokyo | 🇬🇧🇯🇵 | 🔗Link: A workshop by the RIKEN AIP Dynamical Systems Learning Team reporting on project achievements. Current and former researchers will present on topics including simulation-based inference, non-linear dynamics, and machine learning models, and discuss future developments. The event commemorates the project’s 10th year.

• Towards Understanding Deep Learning through the Lens of Statistical Physics | 🕐 14:00 | Online | 🇬🇧 | 🔗Link: An online seminar exploring deep learning from a statistical physics perspective. Using tools like mean-field theory and phase transitions, the talk discusses kernel methods, feature learning theory in Transformers and diffusion models, and aims to uncover hidden principles of deep learning and foundation models.

• Business In Japan Night, OSAKA! | 🕐 18:00 | Swissnex In Japan | 🇬🇧🇯🇵 | 🔗Link: The first official Kansai-based networking event by the Business In Japan community. This event helps professionals interested in business and professional opportunities related to Japan connect. A platform for networking, collaboration, and cultural exchange for Japanese professionals, foreign residents, and anyone interested in expanding their network.

• Growth Strategy from M&A and Business Participation | 🕐 19:40 | Tokyo | 🇯🇵 | 🔗Link: A pre-event for TORYUMON TOKYO 2025 BURST, featuring two startup CEOs discussing growth strategies. The session will delve into real growth stories and offer valuable perspectives for aspiring entrepreneurs and anyone looking to overcome business challenges or hear from experienced founders.

• Sendagaya.rb 507 | 🕐 21:00 | Online | 🇯🇵 | 🔗Link: A weekly online meetup for the Ruby and Rails community. Members discuss hot topics, troubleshoot development issues, and work on personal projects. Topics include Kaigi on Rails and RubyKaigi. It is a casual study group welcoming beginners.

Tuesday, September 30

• Weekly Lunch @ TiB | 🕐 11:30 | Tokyo Innovation Base, Tokyo | 🇬🇧🇯🇵 | 🔗Link: Weekly startup lunch networking in Tokyo. Entrepreneurs, investors, and enthusiasts connect over lunch. Bring your own or buy from food trucks. Casual conversations and discussions.

• Road to NODES | Mastering GraphRAG | 🕐 15:00 | Online | 🇬🇧 | 🔗Link: Take your AI applications to the next level by mastering GraphRAG in this exclusive Neo4j virtual workshop. Discover how to use the neo4j-graphrag open-source python package to build and optimize Retrieval-Augmented Generation (RAG) systems seamlessly integrated with generative AI models.

• Data Intelligence Tokyo 19 | 🕐 18:00 | Wework Shinagawa | 🇬🇧 | 🔗Link: A monthly gathering for an international community of business and tech professionals in Tokyo interested in data. The event focuses on data strategy, management, governance, and networking for English speakers in the data domain. Hosted by Quollio Technologies.

• ClickHouse Tokyo Meetup | 🕐 18:30 | Toranomon Hills Forum, Tokyo | 🇬🇧🇯🇵 | 🔗Link: A meetup for the user community and database enthusiasts to interact, learn, and share ideas. Join to meet peers, share experiences, and explore the latest ecosystem. Sessions will cover new ClickHouse features and its use as an observability platform.

• HN Tokyo Meetup | 🕐 18:30 | Blink Roppongi | 🇬🇧 | 🔗Link: A social event for people in the business and technology scene to network. There will be an opportunity for attendees to make announcements and pitch ideas or startups to the crowd. Recruiters are generally not allowed.

• TAI x DEEPCORE - AI-Driven Science Talks 3 | 🕐 19:00 | Kernel Hongo | 🇯🇵 | 🔗Link: This is the 3rd ‘AI-Driven Science Talks’ event, focusing on ‘AI x Materials’. Experts will discuss how AI, informatics, and automated experiments are revolutionizing materials development, from discovery to manufacturing. It’s for researchers, engineers, and those interested in AI’s industrial applications.

• Career Talk Night / Backend Engineer | 🕐 19:00 | Online | 🇯🇵 | 🔗Link: This online event introduces the work and roles of backend engineers at LINE Yahoo Corporation. Developers will share case studies from services like LINE Gift and LINE Monitoring Platform, covering technologies, team structures, and career paths. A Q&A session will follow the presentations.

• Tokyo HackerSpace Weekly | 🕢 19:30 | HackerSpace, Tokyo | 🇬🇧 | 🔗Link: Weekly gathering for tech enthusiasts, makers, and hackers to collaborate, share ideas, and work on projects together.

• UX for AI Study Group | 🕐 20:00 | Online | 🇯🇵 | 🔗Link: A study group to learn how to effectively utilize AI in products and services in Japan. Participants will learn from global successes and failures by studying articles from a world-famous expert. The session is discussion-based to foster better product development.

Wednesday, October 1

• Yokohama Startup Lunch | 🕐 11:30 | Tech Hub Yokohama | 🇬🇧 | 🔗Link: An expansion of the Tokyo Startup Lunchclub, this monthly networking event in Yokohama brings together entrepreneurs, innovators, and professionals to share ideas and build connections within the local startup ecosystem. Engage in inspiring conversations and expand your network. Note: Lunch is not provided.

• Learning Session on ‘The Guide To Design’ | 🕐 12:00 | Online | 🇯🇵 | 🔗Link: An online study group series to deeply learn from the globally recognized UX introductory document, ‘The Guide To Design’. This session is part of a series held during lunchtime. It’s intended for designers, PMs, researchers, and engineers involved in digital products.

• Shibuya Public Event | 🕕 16:00 | Shibuya Startup Support Space | 🇬🇧🇯🇵 | 🔗Link: Networking event hosted by Shibuya Startup Support, providing tools and connections for startups to grow.

• Monthly Pitch Nights | 🕐 17:30 | Online | 🇬🇧 | 🔗Link: A monthly online event for early-stage founders in Japan to practice their startup pitches in English. Participants receive live, constructive feedback from experienced entrepreneurs and angel investors in a supportive environment. The event is open to founders, investors, and observers.

• Supercharging Gen-AI with Graphs: From Accurate LLMs to Drug Discovery | 🕐 18:00 | Implem Inc., Tokyo | 🇬🇧 | 🔗Link: Join experts in Tokyo to explore how graphs transform AI applications. Learn about GraphRAG for more factual LLMs, Neo4j MCP Servers for AI-ready infrastructure, and how graphs accelerate the drug review process. Ideal for developers, data scientists, and anyone curious about graphs and Gen-AI.

• Tokyo HackerSpace Weekly JP | 🕢 19:30 | HackerSpace, Tokyo | 🇯🇵 | 🔗Link: Weekly gathering for tech enthusiasts, makers, and hackers to collaborate, share ideas, and work on projects together. In Japanese.

Thursday, October 2

• After DroidKaigi 2025 from pixiv | 🕐 12:30 | Online | 🇯🇵 | 🔗Link: An online after-session for DroidKaigi 2025 hosted by pixiv. Android engineers from pixiv will share insights from the conference, including behind-the-scenes stories of their presentations, proposals, and sponsor booth app development. This is a lunchtime session with a Q&A.

• Thursday Gathering 354 | 🕐 16:00 | CIC Tokyo | 🇬🇧🇯🇵 | 🔗Link: A weekly gathering for innovators and entrepreneurs featuring multiple sessions. Topics include open innovation, the startup ecosystem, AI startups, Toyota’s Woven City, and public-private partnerships. The event offers both in-person and online participation for networking and learning.

• ProductTank Tokyo - Monthly Casual Meeting | 🕐 19:00 | Perry’s Bar Shibuya | 🇬🇧🇯🇵 | 🔗Link: A casual, in-person networking event for product enthusiasts, PMs, and aspiring PMs in Tokyo. Join to expand your network, build relationships, find opportunities, and learn from others in Japan’s largest product community over food and drinks.

Friday, October 3

• Road to NODES | Document Graphs with GraphRAG | 🕐 00:00 | Online | 🇬🇧 | 🔗Link: A workshop on GraphRAG, teaching how to convert unstructured documents into structured knowledge graphs using Neo4j and Python. Through hands-on exercises, attendees will build, visualize, and interact with their own knowledge graph to uncover deeper insights from text beyond simple keyword searches.

• 2600 Meeting | 🕐 19:00 | Beemars, Shinjuku | 🇬🇧🇯🇵 | 🔗Link: A monthly meeting for the Tokyo chapter of 2600. Join to discuss hacking or any other topics. The entire bar is reserved for the event, which is the only active 2600 meeting in Japan.

• extension DC Day3 @ LINE Yahoo | 🕐 19:00 | Line Yahoo Kioicho Office, Tokyo | 🇯🇵 | 🔗Link: A joint event by DeNA, Sansan, LINE Yahoo, and ZOZO. This event focuses on the latest technologies like iOS and Swift, reviewing topics from the first half of 2025. It’s an opportunity for attendees to share knowledge and prepare for the second half of the year.

Saturday, October 4

• Daikanyama Morning Code | 🕐 09:00 | Dean & Deluca | 🇬🇧🇯🇵 | 🔗Link: This meetup is for those interested in code, web development, design, cloud, blockchain, or AI. All levels are welcome. Bring your laptop to discuss what you are working on, share projects, and exchange ideas with other participants freely.

• Coffee and Code | 🕐 10:00 | Starbucks In Roppongi Hills Lobby | 🇬🇧🇯🇵 | 🔗Link: A relaxed event for people who code, want to start, or work in any IT-related field. Bring a laptop, grab a coffee, and talk about your projects, get help, and share tips. All nationalities and ages are welcome.

• Dev Japan - 71 | 🕐 12:00 | Impact Hub Tokyo | 🇬🇧 | 🔗Link: A co-working meetup for creatives, engineers, students, founders, and anyone related to tech in Japan. It’s a space to work on projects, collaborate, and interact with like-minded people as an alternative to working alone at home or in a cafe.

Sunday, October 5

• Overseas Business Talk Session - What’s Southeast Asia really like?! | 🕐 16:00 | Coworking Space Cobacco, Shizuoka | 🇯🇵 | 🔗Link: A panel discussion on business in Southeast Asia. Hear from three speakers about their experiences in the Philippines, Vietnam, China, and Malaysia. This event offers real insights, practical tips, and networking opportunities for those interested in global business challenges.

• Digital Nomads Craft Beer Night in Harajuku | 🕐 17:00 | The Folks, Tokyo | 🇬🇧 | 🔗Link: A relaxed social event for digital nomads, expats, and internationally-minded locals to make new connections. There is no entrance fee, but attendees must pay for their own food and drinks. Communication will be mainly in English.

• Malaysia Discussion Session | 🕐 21:00 | Online | 🇯🇵 | 🔗Link: A casual discussion for those interested in Malaysia and Kuala Lumpur, featuring a native Malaysian and a frequent visitor. This event aims to provide a deeper understanding of the country and serves as a pre-event for Startup Weekend Kuala Lumpur.

Disclaimer

Events above are collected from a variety of online open sources. There might be changes or cancellations. Please check the event page for the most up-to-date information.

If you have an event to share, please let us know - we’d love to include it in our next digest! Mail us at [email protected].