JOnsen 2023

Welcome to the most relaxed Java unconference in the world!

About JOnsen 2023

JOnsen is an unconference for Java Developers and Java Communities in Japan and all over the world.

JOnsen 2023 will be held at Hoshino Resorts RISONARE Yatsugatake in Yamanashi Prefecture, which is about a 2-hour train ride away from Tokyo and boasts beautiful nature and delicious food. If you would like to attend JOnsen Unconference, please apply via link below.