Glad you reached out!
Check-ins are part of the #buildinpublic process when you are encouraged to write about your project’s advancements on Bolt.Fun.
See more here: https://bolt.fun/story/how-to-buildinpublic--169
We don’t currently have full support for Japanese (our team has English, Spanish, French, Arabic and Portuguese speakers) but feel free to reach out to nostr:npub1nstrcu63lzpjkz94djajuz2evrgu2psd66cwgc0gz0c0qazezx0q9urg5l organizers for further support.