From what we can tell (machine translation often thwarts our best attempts at fact checking), Hitachi will be joining the likes of display manufacturers iRex and Sony when they release a commercial eBook reader in Japan tomorrow. The black-and-white e-ink model, supposedly called the "Albirey" and developed with technology from Bridgestone, seems to sport a WiFi connection with "the possibility to modify making use of radio communication," whatever that means, and comes in a package with standard A4 paper-size dimensions. The Albirey should be available tomorrow starting at what Nikkei Net is claiming to be 4,000,000 yen, which is probably the result of some Google Language shenanigans, 'cause that's like $36,000.
Update: Once again, our readers have stepped in and succeeded where machine translation has failed: apparently the price quoted is for a batch of 10 units, which indicates that this unit probably intended for commercial displays and not consumer eBook consumption. Also, make sure to check out the comments for the full specs.