BOS-SHOP is a Top Rated seller trusted by more than ten thousand Amazon.co.jp customers in Japan. They sell in ベビー＆マタニティ department from BOS ボス and BOS ボス brands. They offer Prime shipping for the several dozen products they have in stock.
They are a Top 500 Amazon.co.jp seller, ranked 104th overall. However a month ago they were ranked 90th.