Ruby Kaigi Accommodations

The conference has been delayed to a new date September 3-5, 2020, read the announcement.

Many events are delayed and cancelled in Japan from this sheet.

アナウンス無し No announcement
検討中 Discussing
実施予定 Planned as usual
延期 Delayed
中止 Cancelled
オンライン開催 Online

Nippon Travel Agency is the official travel agency for RubyKaigi 2020.

Check availabilities from Nippon Travel Agency at here.

Recommend to book with Nippon Travel Agency.

I also did some research for you:

Feel free to contact me for any question.

Hope this helps!