Ah! My friend should reach Osaka in upcoming days, did you have more information were he can find these machines / company that are operating?
He tried to look in each store (I suppose
) but he didn't find nothing. I remember that initially Satori coins were sold on these machine 
that's why I was curious if something similar was still available.Meanwhile, he visited a coworking space (Lounge Gox) and should also visit a crypto/bitcoin bar in Tokyo.
I hope he can find some suitable for my collection
No clue about which company is operating them actually.
The area where I saw them was near "Tsutenkaku Tower", little bit of a low level area with lots of bars, retro arcade game centers and other amusement stuff.
Not sure if they are still sold since they change the contents of these gacha machines quite frequently so basically you can only try.
Crypto bars are pretty rare these days in Tokyo. I remember in like 2017-2019 there were some but then the whole crypto system in Japan changed, they got rid of all the ATMs and everything only went through exchanges at some point. Even at localbitcoins you didn't have the option to select btc for cash anymore because of new laws.
Hopefully you friend can still find something, it's definitely worth trying!
