worldbooksjapan is trusted by more than fourty thousand Amazon.co.jp customers in Japan. They sell in ミュージック, DVD and 文房具・オフィス用品 departments from Penguin Books, Emi, VIZ Media LLC, Bantam, Penguin Classics and other brands. They have tens of thousands products in stock.
They are a Top 50 Amazon.co.jp seller, ranked 38th overall. However a month ago they were ranked 36th.