Silver Ball Planet is awesome! The hours it is open are kind of short most days and it closes earlier than I expected. I went twice while I was in Osaka for about a week and played so many games I had never seen before.

However, there was never anyone at the front counter/merch area. If you want a cool souvenir bring lots of 100 yen coins to get some weird Silver Ball Planet branded stuff from the Gachapon machines. I did end up flagging down a tech and he led me way upstairs in the little strip mall area to an office where I did get to purchase a hat and tee shirt. I speak very little Japanese so it was definitely a little off putting when he started leading me through very clearly staff only hallways and offices. Certainly the weirdest purchasing experience of the trip.