# RubyKaigi

> The international conference for the Ruby language, held in Japan over three days each spring. The host city changes every year.

- Type: Other
- Admission: See official site
- Typically held: Three days in spring, usually April or May. The dates and the city are announced roughly a year ahead.
- Official site: https://rubykaigi.org/

## Dates

- 2027-04-14 to 2027-04-16
- Status: confirmed
- Dates verified on 2026-08-21 from https://rubykaigi.org/2027/

RubyKaigi is the conference for the people who work on Ruby itself, and it is held in Japan because that is where the language was written. Talks are technical, often about the interpreter, the type system or the compiler, and a good share of them are in English. Japanese sessions are interpreted live into English; there is no interpretation the other way. It deliberately moves. Recent years have been Matsumoto in Nagano, Naha in Okinawa, Matsuyama in Ehime and Hakodate in Hokkaido, and the next one is in Miyazaki on 14 to 16 April 2027. The point is partly to bring the conference to a different part of the country each time, and it means attending twice is two different trips. Tickets are paid and recent years have sold out before the doors opened. Book accommodation early too: the host is usually a mid-sized city rather than Tokyo, and the good rooms go months ahead.

## FAQ

### Where is RubyKaigi held?

A different Japanese city every year. Matsumoto in 2023, Naha in 2024, Matsuyama in 2025, Hakodate in 2026, and Miyazaki in 2027. The city is announced about a year ahead, at the end of the previous conference.

### Do I need Japanese to attend?

No. A substantial share of the talks are in English, and every Japanese-spoken session is interpreted live into English. It does not run the other way: an English talk has no Japanese interpretation.

### Is it open to the public?

Anyone can buy a ticket, but it is a paid conference rather than a public event, and there is no entry on the day. Tickets sell through rubykaigi.org some months beforehand.

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Source: RubyKaigi — Japan Voyage