TLDR : Help Japan with your burger dollars and don't cancel your orders

J-Anon here.
Japan mostly has a "no return" policy.
You preorder it, it's a done deal.
No coldfeet, pussyfooting, buyer remorse.

You expressed interest in it, the retailer will get it for you. Profit margins are paper thin for these stores and the people working their only make ¥18-20man ($1300) a month.
Sadly, that's the national average after taxes in Japan.

Any stories you hear of people like IT guys, Youtubers making it big in Japan, those are just the outliers who got lucky with a nice paycheck. Everyone here makes shit pay and do it with a polite smile.