Enough yen?

Hi, I'll be travelling to Japan in a week for 2.5 weeks, split between kyoto, osaka, tokyo and some surrounding areas.

I plan to spend on shopping as i'm unsure when i'll next be able to visit (clothes, gunpla, general crap to fill the suitcase with)

I've filled my wise/international card with about 400,000 yen and still worried if this will be enough, all excursions (or at least most) are paid for, as is accomodation and flights etc so this will be purely spending cash, will be taking the shinkansen to and from kyoto/tokyo and a day trip to hiroshima.

willing to top it up some more if needed but I would like to think i've set aside enough already lol.

any thoughts? sorry to go on a bit, eek.