Find us on GitHub at swcarpentry_ja
Chat with the core team on the Tokyo.R #swcarpentry slack channel (日本語でも大丈夫).
Anyone is welcome to contribute to Japanese lessons or join the core team. You do not need to be located in Japan but strong English and Japanese language skills will be helpful. See our Github repository1 for more details on how to contribute to translated lessons.
1: Repository for translations: <https://github.com/swcarpentry_ja/i18n>