Its been three months since 10bet Japan announced their service in this forum, since that time as well there are some people suggest them to provide the English version of the site but seems that it is still not available till now. I cant even access the site currently, I thought it is because it is blocked by my internet provider but when I tried to access it using VPN (Opera with VPN), it gives me error 1020 "the website is using security service to protect itself from online attacks"
Based on this
https://downforeveryoneorjustme.com/10betjapan.com, it shows that the site is indeed down for everyone so I wonder how could you make a review a site which is down (not sure when it started to down) but the previous post also about the downtime of the site which is on May. So I assume that the site is down for long time already.