Its sales was suspended due to certification issue, but is now sold again. Initial price was too expensive but finally it's available at $270. https://iosys.co.jp/items/smartphone/balmuda/softbank/balmud...

Interesting, do you know if one can buy it without a contract internationally? I live in the EU and would be very interested in one.

I haven't used, but maybe buying via buyee would be easier. All of listed items are wihout contract. https://buyee.jp/category/yahoo/shopping/49331?query=balmuda...

Here's supported bands https://tech.balmuda.com/jp/support/phone/faq/network/48/