JOnsen – a Java unconference in Japan.

JOnsen 2018 dates are set.  Please reserve May 18th through May 20th.  The venue this year will be the Prince Ryuguden.

You can register for the event on the following website:

Also, be sure to sign up for JOnsen mailing list here:


Some photos from the 2017 event:

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Sometimes unusual ideas are the best. What about holding a Java unconference at a relaxing hot spring (Onsen) deep in the heart of Japan? Having Java experts from Japan and all around the world together in a relaxing atmosphere to philosophize and exchange ideas. Held this year for the very first time.

May 12th – 14th 2017