Found this site on 2ch:
http://www.jbook.co.jp/p/p.aspx/bun_realrank_10/
Apparently it's a "real-time" album sales chart. Here's the top 10 as of ~Midnight Japan time:
01 "GUILTY" (+DVD) - Hamasaki Ayumi
02 "5296" (+DVD) - Kobukuro
03 "orbital period" - BUMP OF CHICKEN
04 "5296" - Kobukuro
05 "EXILE LOVE" (+2DVD) - EXILE
06 "AND I LOVE YOU" - DREAMS COME TRUE
07 "Jiko Best 2" - Oda Kazumasa
08 "EXILE LOVE" - EXILE
09 "GUILTY" - Hamasaki Ayumi
10 "ONE LIFE" - Kuraki Mai