Scardown: 軌道上の戦い is the Japanese edition of Scardown, book two of the The Jenny Casey Trilogy. It is available here in mass market, signed by its author, Elizabeth Bear.
"I’ve got to say this story moves at light speed. The troubled future of Scardown is nice and as gritty as the technology is cool; nanotech, faster-than-light travel and AI all play prominently...the nail-biting, adrenaline-fueled final scenes are nothing short of pure science fiction heaven." -sfsignal.com
Scardown (Japanese) added to cart!