Get yourself a YAJ account and keep your fingers crossed. You’ll still be competing against a lot of people, and prices can go nuts, but sometimes you get lucky. Bought easily 200k of merchandise for people on the forum from there between 2022-23. I got a lot of stuff for myself just throwing “bullshit bids” out there. Just don’t get emotional and keep bidding more than you want to pay, especially for common stuff like CPS2 boards. I promise others will appear. I built a good size console and arcade collection this way in about two years. Shipping it all back to America was rather expensive when it came time for me to move, so keep that in mind when building your collection up out there. Keep each package under 150,000 yen if possible to avoid extra fun with export customs (about 5000 yen plus 3-4 days more time per package if you don’t heed this advice). Anyway, enjoy your time there!