Better photos:
http://mainichi.jp/select/biz/graph/...der/index.html
Japanese product page:
http://www.sony.jp/reader/
Basic interface seems to be the same, only translated. Vertical text display is shown, I wonder if they used EPUB or LRF for it. Japanese input is available for searching and notes. Two dictionaries: Genius
Japanese-English English-Japanese and New Oxford American.