Spending Money in Japan

I have a trip to Japan planned for two weeks but I’m concerned about how I should spend my money. We will be going to Tokyo, Kyoto and Osaka. I have a PNC cash unlimited card and I’m debating how much money I should bring for those two weeks.

For my first question, would my credit card work in Japan? Outside of spending the money on food, I plan on getting souvenirs for myself and family (manga, gundam, anime figures, etc.).

If I can use my credit card, but if I can’t use it in certain places, how often would that happen? I plan on going to my bank soon and I’m debating about how much money I should withdraw.

Am I over thinking this? Any advice would be much appreciated, thanks!