/vt/ - Virtual Youtubers

>>88296836
off the top of my head:
Go to an onsen
Look for concerts/events happening during your stay and buy tickets if you're interested
See if any of your favorite series have pop-ups (usually acrylics, but you might find some cool stuff)
Tokyo Character Street in Tokyo Station has a fuckton of merch from different series
Ikebukuro Sunshine City has a lot of anime stores too
I always say go to Harajuku if you're interested at fashion in any way (used jewelry is cheap and high quality here)
Try out stuff that's best in Japan like gyukatsu, tonkatsu, katsu curry, karaage, okonomiyaki, tempura, conveyer sushi chains, and local sushi. This requires looking through Google Maps and tabelog to see what's close to you and if restaurants are foreigner unfriendly and require reservations
There are tourist traps like Golden Gai but hopping around tiny ass bars and getting various chicken skewers and beer was still fun for a bit
I really liked the chain Torikizoku (cheap yakitori and drinks) and went multiple times during my last trip
Karaoke box so you can belt out BAUDOL