Anon09/15/25, 17:59No.2823958
I went in March this past year. I couldnt go to every single museum obviously but I didn't run into any issues with any of the museums I went to although I only went to a couple (and one was the Peace Museum in Hiroshima so not even Tokyo). I didnt experience any issues with anything being closed while I was there, museums, shops, shrines, or anythingIt even snowed while I was there which was very nice and pretty.But the thing with Japan now is that no matter when you go it's going to be crowded. Of course certain times are going to giga crowded like April/May and July/August, but even when I was there in March it felt super busy and I saw tons of foreign tourists especially around Shinjuku and Akiba.
My guess for the time with the least foreigners would be December since I imagine you'll filter out a ton of foreigners that don't want to do a big trip so close to Christmas. Don't do January, the start of the new year is a big time in Japan and a lot of natives take time off then.