the only rewards in the game come from the glowing chests that you see placed randomly around the game space, they are 4 gag worthy versions of the nice food items you get in the main lounge from the food vendors. When you have accumulated enough points you can see the little old woman in the main lounge to use your points to get rewards.
Kal-El: i did the same thing but i think what it does is give you "better" ryo and bu the next time you play. I played again after getting the sword of kusanagi and received more ryo than usual along with 2 bu. don't have a clue what you do with it though...
So there are actually no rewards for this game?
There's rewards in the game, they'll glow so they shouldn't be too hard to spot.
Plus the suspicious old lady outside the game, before you start it. She'll have a list of items you can buy, with points.
I'm not sure if she's working yet, or not.
the sword of kusanagi is just a furniture item.
The handling of the rewards in Home has been a problem for most. Many rewards needs a restart of home and sometimes you even need to try a few times to get it.