There are two Capsule Machines in Osaka, both with the same prize pool. They are refreshed each time you load into Shinsekai from a different part of the city. For curiosity's sake, here are all the prizes and dialogue responses. It costs 500 yen per roll.
Guide To Osaka's Capsule Machines
Normal Prize
Just a normal prize, huh? Hey, don't look so down.
- Prize: Skull Keychain
- Sells for 350 yen.
Rare Prize
It says this one's a rare prize. Not too shabby.
- Prize: Expired Perfume
- Increases Jail's security level.
Super Rare Prize
Oho, that one's super rare! Lucky you, eh Joker?
- Prize: Mossy Mothman
- Sells for 5,000 yen.
Super Duper Ultra Mega Rare Prize
Whoa, super duper ultra mega rare!? That's a lot of adjectives...
Anyway, that's the rarest possible prize! Great job!
- Prize: Billiken Statue Accessory
- Luck +10
Source: https://gameplay.tips/guides/10145-persona-5-strikers.html
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