Kotlin Fest 2026
Overview
A Kotlin-focused community conference under the banner "cherishing Kotlin," hosted by the Japan Kotlin User Group. Kotlin engineers share knowledge across Android and server-side in CfP-selected sessions. Running since its 2018 debut, it is the central event of Japan's Kotlin ecosystem.
Foundation
- Founded
- 2018
- Founder
- Japan Kotlin User Group
A Kotlin-specific conference launched by the Japan Kotlin User Group in 2018. Held in 2018, 2019, 2022, 2024, and 2025, it has settled into a full-day event with a social gathering at Tokyo Conference Center Shinagawa; the 2026 edition proceeds through open CfP, scholarship, and sponsorship calls.
Transition
- 2018 初回開催
- 2024 東京コンファレンスセンター品川で開催
- 2025 11/1開催（同会場）
- 2026 11/14開催（同会場）
Developers Summit 2026 Summer
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PHP Conference Japan 2026
The annual gathering of Japan's PHP community and one of the country's oldest language conferences, first held in 2000. Run by a volunteer committee tied to the Japan PHP Users Group at Ota Industrial Plaza PiO, its home since the first edition. Despite free admission, it packs around 30 accepted talks across multiple tracks, ranging from AI-era development and legacy code to PHP internals such as OPcache and JIT, making it a fixed point for observing where Japan's PHP community stands.
AI DevEx Conference 2026
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