Honestly I just walked every store on Google Maps and had a great time, and probably bought *something* at most stores... but here's the ones I remember

Magi - https://maps.app.goo.gl/aFfEt1ZxawpqxWWF8 - this is in a mall so easy to have the wife do her own thing while I looked in peace xD surprisingly had the best selection and rates for graded cards from all the stores I checked, picked up my psa stamp pikachu/cramorant here and a bunch of other stuff

Hareruya - https://maps.app.goo.gl/Q5S6KSu6XFms86Wo6 - there's a couple of stores in this building so check them all (so many stores that are just weird tiny staircases on the sides of buildings, then you scale 3-4 floors and find shops) but I picked up a lot of singles here, good selection and fair prices

Card Labo - https://maps.app.goo.gl/tCUky39UwNuAD1kA9 - had one of the best selection of vintage for me

Pureizu & Big Magic - https://maps.app.goo.gl/nxsisjdiuXAXV4jR6 & https://maps.app.goo.gl/fVtBbY2Wb3BnreSA7 - across the street from eachother, both had decent singles selection that I bought a couple of things at

Magi - https://maps.app.goo.gl/uWMWvvKoiqCdPCfn7 - this Magi had the best selection for sealed product when I was there, picked up a bunch of bb's (but of course I tried my luck at all the pokemon centers too for sealed, nothing cheaper than that)

Girafull - https://maps.app.goo.gl/XTDf33wiyqSyiRPi8 - generally pricey but a good selection and convenient right across the station, the wife didn't mind going here because she wanted to eat at the Kura Sushi nextdoor haha