Strange! The same user is allowed to create accounts on the sister site of Betpanda which they have actually created for Japan. I'm wondering why they have created a new site for the people of Japan while Japan isn’t listed as the restricted country in Betpanda.io. Both sites have the same gambling license. The difference is only in the language of the websites.
Gambling and its legal status in Japan is mostly banned in Japan [1].
[1]
https://en.wikipedia.org/wiki/Gambling_in_JapanI am not a Japanese and I don't live in Japan so it's only information from Wiki. If gambling is not legal in Japan, and if Betpanda wants to provide their services to Japanese, they must have many mirror sites as Japan governmental authorities can work, find and restrict the main and mirror sites of Betpanda if they know.