@Nikkei_Simmer You're a Japanese, right? Can you try Amazon Japan? I got my disc collection there second hand. I got them fairly cheaply and the previous owners didn't seem to care about the online site so I was lucky and got the limited edition freebies when I entered the codes, and I'm talking recent, like the last 2 years. The installation setup is in Japanese but I've set my game to English so I can play in English just fine.
Here is the link and I've filtered it so it only shows the disk and not digital codes. Edit: I'm on mobile and looks like the filter resets, digital code ver are still showing...be careful!
Right now, WA is only 800 yen (got it for 400 yen before), GEN is 700! Sometimes the prices fluctuate so you have to check back once in a while.
