Check this out, there is a POTA Spots Nostr account for Japan in English, nostr:npub18ctfr2n4h6m2lu5g0enhky8cnfdtnac70c79fqqwk64ed5a0mxnsj9rk6u . I just happened to see it in the universal feed. Give them a follow.

Also, let me know if you find more ham radio focused Nostr accounts to boost. We need more of this. nostr:note12j3vhxe449uxr20r900vpt2c0ejulgk5l6ansc4ajdnvdf397kwq8nsat7