Hello i have been playing the game for not a long time but i noticed that the game REALLY need a feature:
The Bank:
A new building, you can't beg here, but you can exchange coins
I think it would be really usefull because the "1 yen coin" is the most common in the game but when you have 50+ of them they can become a hindrace to put in the machine (if you want to get rid of them); but also for 500 yen coins since even though they are the most valuable, sometimes you may need do spend less than 500 for something.
Also the "exchange" can be both by pressing a button or instant (for exhample if you select "1 yen --> 5 yen" and you have 52 1 yen coins you would get 10 5 yen coins and 2 1 yen coins remain) .
I think it would also be usefull to make paying easier for exhample if you need 100 yen you can just convert 10 coins of 10 yen insted of inserting them all.
If you agree with me or want to correct something feel free to reply.