# Week of Mon, June 15, 2026 · JapanTech

Jun 15 – Jun 21 (JST). Page: https://japantech.info/weeks/2026-W25/

## Mon, June 15, 2026

- [Tech Brunch Event](https://japantech.info/events/meetup-315080662/): Mon, June 15, 2026 07:45 JST, Beltempo, Hotel Metropolitan Edmont, 3 Chome-10-8 Iidabashi, Chiyoda City. A relaxed open source brunch meetup in Iidabashi for engineers, designers, and anyone curious about open source communities.
- [Public Speaking for Developers](https://japantech.info/events/luma-m4if17ik/): Mon, June 15, 2026 18:30 JST, Minato City, Japan. Practical public speaking and pitch practice for developers who want their hackathon and conference talks to actually land.
- [Sendagaya.rb #530](https://japantech.info/events/doorkeeper-197618/): Mon, June 15, 2026 21:00 JST, Online. The 530th online study session from a western-Tokyo regional community for Ruby and Rails enthusiasts.

## Tue, June 16, 2026

- [Tokyo Weekly Lunch](https://japantech.info/events/meetup-sxwcxtyjcjbvb/): Tue, June 16, 2026 12:00 JST, Expanded details for Tokyo Station City Sapia Tower Tokyo Station City Sapia Tower, 1-7-12 Marunouchi Chiyoda-ku, 13 100-0005. Weekly lunchtime networking for Tokyo's startup community: founders, investors, and engineers, no pitches, just real conversation.
- [Business In Japan Night Osaka #002 - Supported by Swissnex Japan](https://japantech.info/events/doorkeeper-197426/): Tue, June 16, 2026 18:00 JST, 在大阪スイス領事館, 大阪府大阪市北区堂島1丁目1-5. A relaxed evening of business networking from the BIJ community at Swissnex Japan in Osaka.
- [Engineering Reliable AI at Scale](https://japantech.info/events/luma-byrcrfb7/): Tue, June 16, 2026 18:00 JST, Shibuya, Tokyo. Tokyo AI evening on engineering reliable, production-grade AI: governance, multi-agent QA, and the human layer behind real-world adoption.
- [Weekly Tuesday Meetup](https://japantech.info/events/meetup-314974919/): Tue, June 16, 2026 19:30 JST, Tokyo HackerSpace, Akasaka, 8 Chome−12−13 アゼリア赤坂 102. Weekly drop-in open house at Tokyo HackerSpace in Akasaka, Tuesday evenings 7:30 to 10 pm.

## Wed, June 17, 2026

- [UK Japan: Creative Tech Innovation](https://japantech.info/events/luma-dudy6uy5/): Wed, June 17, 2026 10:00 JST, Chiyoda City, Japan. UK and Japanese creative tech leaders meet as London scaleups join the Createch Trade Mission to Japan 2026.
- [Yokohama Startup Lunch](https://japantech.info/events/meetup-srqnxtyjcjbwb/): Wed, June 17, 2026 12:00 JST, TECH HUB YOKOHAMA, 横浜市西区みなとみらい２丁目２番１号 横浜ランドマークタワー. A monthly midday networking lunch connecting founders, professionals, and investors in Yokohama's startup ecosystem.
- [AI4S Seminar Series "Structured representation learning: tensor network principles toward scalable and reliable AI" Talk by Qibin Zhao (RIKEN AIP)](https://japantech.info/events/doorkeeper-197661/): Wed, June 17, 2026 16:00 JST, Online. RIKEN AIP's Qibin Zhao on tensor network principles for scalable, reliable AI, part of the AI4S seminar series.
- [Snack and Connect](https://japantech.info/events/gcal-1cqjeihehcok5mht496nifhtmg_20260617T1600/): Wed, June 17, 2026 16:00 JST, Shibuya Startup Support, Japan, 〒150-0011 Tokyo, Shibuya City, Higashi, 1-chōme−29−３ 渋谷Bridge B棟. Weekly drop-in startup networking at Shibuya Startup Support's Bridge office — no pitches, no registration, just snacks and conversation.
- [Ishikawa Startup Networking in Tokyo 2026](https://japantech.info/events/peatix-4990267/): Wed, June 17, 2026 17:00 JST, Tokyo Innovation Base, 東京都千代田区丸の内3-8-3　1F. An annual startup networking event linking Tokyo and Ishikawa, with an IPO keynote, lightning talks, and networking at Tokyo Innovation Base.
- [JichiTIME Meetup with Nagoya City × Takamatsu City](https://japantech.info/events/peatix-4971729/): Wed, June 17, 2026 18:30 JST, Tokyo Innovation Base, 千代田区丸の内３丁目８−３. A meetup featuring guests from Nagoya City and Takamatsu City presenting co-creation programs between local governments and startups.
- [THS "Nihongo Night" Open House](https://japantech.info/events/meetup-314992674/): Wed, June 17, 2026 19:30 JST, Tokyo HackerSpace, 赤坂8丁目12−13 アサレアビル102. A Japanese-language open house at the new Akasaka space, where makers gather to look around and meet each other.

## Thu, June 18, 2026

- [Tech Brunch Event](https://japantech.info/events/meetup-315164574/): Thu, June 18, 2026 07:45 JST, Beltempo, Hotel Metropolitan Edmont, 3 Chome-10-8 Iidabashi, Chiyoda City. A relaxed Lisp-focused tech brunch in Iidabashi with lightning talks, live demos, and discussion of Clojure, Scheme, Racket, and more.
- [Thursday Gathering #386](https://japantech.info/events/gatherus-79ec7ab0-8196-4ae5-b231-66e6ea735ae5/): Thu, June 18, 2026 16:00 JST, CIC Tokyo, Toranomon Hills Business Tower 15F, 1 Chome-17-1 Toranomon, Minato City, Tokyo. Venture Café Tokyo's weekly Thursday Gathering at CIC Tokyo: talks, panels, and networking across the startup and tech ecosystem.
- [AI Tinkerers Tokyo - Shinagawa: June 18th Meetup](https://japantech.info/events/luma-77zi8bzd/): Thu, June 18, 2026 18:00 JST, Shinagawa City, Japan. Curated technical show-and-tell for AI builders: 8-minute demos on how you built it, no pitch decks. PostHog-sponsored, Shinagawa.
- [Robotics x STREAM Education!](https://japantech.info/events/meetup-314842112/): Thu, June 18, 2026 18:00 JST, CIC Tokyo, 1-chōme-17-1 Toranomon, Minato City. A panel on the state and future of STREAM and robotics education in Japan, with industry voices and networking at CIC Tokyo.
- [Breaking the 30/50/100-Person Walls: People and Org Design That Keeps Scaling (Hybrid)](https://japantech.info/events/peatix-4996211/): Thu, June 18, 2026 18:30 JST, Tokyo Innovation Base, 千代田区丸の内３丁目８−３. Keynote and panel on how scaling startups break through the 30, 50, and 100-person org walls (hybrid).
- [WWDC26 Report Session at LINE Yahoo, ZOZO](https://japantech.info/events/connpass-396375/): Thu, June 18, 2026 19:00 JST, LINEヤフー株式会社 赤坂オフィス. A report session sharing WWDC26 announcements, held at LINE Yahoo's Akasaka office.

## Fri, June 19, 2026

- [Tech Brunch Event](https://japantech.info/events/meetup-315164592/): Fri, June 19, 2026 07:45 JST, Beltempo, Hotel Metropolitan Edmont, 3 Chome-10-8 Iidabashi, Chiyoda City. A small, casual NLP-focused brunch in Iidabashi to discuss the tools, math, and ecosystem of natural language processing.
- [Cybersecurity in the Era of LLMs: Governance, Runtime Protection, and Automation](https://japantech.info/events/luma-mx0hv141/): Fri, June 19, 2026 16:00 JST, Minato City, Japan. Tokyo AI and JICSS present a panel and three talks on securing LLMs and agentic AI: governance, runtime protection, and automated remediation.
- [Harvard Business-Style Management: Techniques to Deliver Results in the First 90 Days](https://japantech.info/events/connpass-385299/): Fri, June 19, 2026 19:00 JST, Online. An online workshop teaching new managers Harvard-style frameworks for delivering results in their first 90 days.

## Sat, June 20, 2026

- [How to Win Friends and Exit Vim: A Brunch for Vim Users](https://japantech.info/events/meetup-315164594/): Sat, June 20, 2026 07:45 JST, Beltempo, Hotel Metropolitan Edmont, 3 Chome-10-8 Iidabashi, Chiyoda City. A small, relaxed brunch for Vim users to share .vimrc and init.lua configs, plugins, and modal editing tips in Iidabashi.
- [SDGs to Startups Hackathon 2026](https://japantech.info/events/luma-zvzuyy5z/): Sat, June 20, 2026 09:00 JST, Koto City, Japan. Two-day Tokyo student hackathon turning SDG ideas into startup prototypes, with top teams pitching to VCs.
- [Marunouchi Morning Code](https://japantech.info/events/luma-2gcqkjk6/): Sat, June 20, 2026 10:00 JST, 千代田区, 東京都. A relaxed morning meetup in Chiyoda for coding, web, cloud, blockchain, and AI: bring a laptop and work alongside peers.
- [Tengu Underground 11.0](https://japantech.info/events/meetup-315224278/): Sat, June 20, 2026 11:00 JST, Meeting Spot, 〒104-0061 Tokyo, Chuo City, Ginza, 3 Chome−10−1 銀座グランディールビル. Monthly hands-on cybersecurity & ethical hacking workshop by TenguSec: 7+ hrs of practical web/network security, no talks, lunch included.
- [\[Specialized Skills\] Build a Compact FM Radio!](https://japantech.info/events/peatix-5005763/): Sat, June 20, 2026 12:00 JST, Tokyo Innovation Base, 千代田区丸の内３丁目８−３. Build a compact FM radio while learning PCB mounting, case mechanical design, and laser-cutting basics at TIB FAB.
- [\[Online\] \[#93\] Let's Translate MDN Together! Translation Community Regular Meetup](https://japantech.info/events/doorkeeper-197431/): Sat, June 20, 2026 13:00 JST, Online. The 93rd monthly online meetup to translate MDN Web Docs (Japanese), with experienced members supporting the GitHub PR-based translation workflow.

## Sun, June 21, 2026

- [Tech Brunch Event](https://japantech.info/events/meetup-315164597/): Sun, June 21, 2026 07:45 JST, Beltempo, Hotel Metropolitan Edmont, 3 Chome-10-8 Iidabashi, Chiyoda City. A small brunch meetup for functional programming practitioners to share projects in Clojure, Haskell, Scala and more, with lightning talks and demos.
- [Haskell-jp Mokumoku Coding Session #348](https://japantech.info/events/connpass-397468/): Sun, June 21, 2026 13:00 JST, Haskell-jp Slack Workspace. An online focused co-working session for working on Haskell, with free-form tasks, optional lightning talks, and free entry.