"n the case of child safety, Japan has significantly more lax laws related to CSAM which has resulted in a cultural divide4 where most users in Japan are segregated from the rest of the Fediverse"

This is why Japan adopted Nostr early on. It's good that they largely use their own relays, but the cross-over is a dangerous area for people not in Japan.

https://stacks.stanford.edu/file/druid:vb515nd6874/20230724-fediverse-csam-report.pdf