you know that almost nobody in Japan is actually paying the retail price right? This is true even on day 1. It's not like in the US at least i know that. Lets take even the top selling game on there, you can easily get it for 5390 on amazon or 5508 at yamada denki but you are using a 6998 yen price.
currently playing: Skyward Sword, Mario Sunshine, Xenoblade Chronicles X