We're building a comprehensive hackathon directory for Japan — a single place to find every build weekend, jam and design challenge in the country, in Tokyo and beyond.

We aggregate events from Luma, Eventbrite, Meetup, Devpost and direct submissions so you never miss a hackathon happening near you.

Have a hackathon to list? submit it here — live within 24 hours.

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faq

How do I submit a hackathon?+

Use the Submit Hackathon button in the header. Give us the name, dates, city, registration link and a banner if you have one — we review and publish within 24 hours.

Is it free to list a hackathon?+

Yes. Standard listings are free forever. Get Featured is a paid option that pins your event to the top of the directory.

How often is the directory updated?+

Weekly. We sweep Luma, Eventbrite, Meetup and Devpost once a week, and direct submissions are reviewed the same day.

Why is there no city page?+

Because the calendar is overwhelmingly in the Tokyo metropolitan area. Events in the 23 wards, Kawasaki, Yokohama, Chiba, Saitama and Tsukuba all browse under Tokyo; Osaka, Kyoto, Nagoya, Fukuoka and Sapporo keep their own name on the card and get pages of their own once they carry enough events to fill one. The split that does carry information — in person against online — is a filter on this page.

Can I attend online hackathons?+

Yes, when one is listed — including events run from elsewhere in Asia that accept teams in Japan. The Online chip in the browse column shows them.

hackathonjapan:

upcoming hackathons

Community Hack Day

Community Hack Day

DevDay Exchange Community Hackathon: Osaka

DevDay Exchange Community Hackathon: Osaka

Agent Forge AI Hackathon ハッカソン東京

Agent Forge AI Hackathon ハッカソン東京

Daytona HackSprint Tokyo ハッカソン東京

Daytona HackSprint Tokyo ハッカソン東京

Clay in Tokyo: 【Clay ハッカソン】求人データで設計する、インテントシグナル営業リスト

Clay in Tokyo: 【Clay ハッカソン】求人データで設計する、インテントシグナル営業リスト

Social Hack Day #79

Social Hack Day #79

Humanoid Hack Countdown 年越しハッカソン

Humanoid Hack Countdown 年越しハッカソン

past hackathons

Social Hack Day #78

第3回ミニハッカソン@SUPROUT

東京ハッカソン〜コンテンツの力を、AIのひらめきに Tokyo Hackathon l Build AI with character

DevDay Community Hackathon: Tokyo

Dev Days x Student Hackathon | Hino City, Japan

Tokyo Agent Hackathon – 東京エージェントハッカソン

DevDay Community Hackathon: Team Matching & Networking Night（前夜祭）

Grok Bot Tokyo Hackathon

はじめてのハッカソン！Yuki先生とAIでアイデアをカタチに｜OrbsCafe #25

Impact Osaka 2026: Autonomous Agents Hackathon

Go Global Hub #1 Discover Global Challenges

（招待制）Colosseum Hackathon VIPパーティ @ 麻布十番

AI Film Hackathon in Tokyo - September 2026

AI Founders Mindset Hackathon #001 - Build AI Agents to Solve Real Enterprise Problems Co-Hosted by Datadog

Subako.AI Hackathon

Build Your Own AI Avatar - Hackathon for Developers & Vibe Coders #Hackvatar

Tokyo AI (TAI) | OpenAI : 100-Hour Game Builder Challenge

Osaka/Japan🇯🇵 説明会開催！君のアプリで世界を獲れ in 大阪｜世界最大級のモバイルアプリハッカソン「Shipaton 2026」（優勝賞金 約1600万円・賞金総額 約1.6億円）

Shipaton x HACK.BAR Night in 大阪｜世界最大級のモバイルアプリハッカソン「Shipaton 2026」（優勝賞金 約1600万円・賞金総額 約1.6億円）

魚沼ハッカソン

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Osaka/Japan🇯🇵 説明会開催！君のアプリで世界を獲れ in 大阪｜世界最大級のモバイルアプリハッカソン「Shipaton 2026」（優勝賞金約1600万円・賞金総額約1.6億円）

Shipaton x HACK.BAR Night in 大阪｜世界最大級のモバイルアプリハッカソン「Shipaton 2026」（優勝賞金約1600万円・賞金総額約1.6億円）