The price drop coincides with the release of Phantasy Star Online 2 for Vita in the country. The game will be available as a free download, and at retail with items, accessories, and costumes bundled in. A new Ice Silver Vita model (see below the break) including PS02 and an 'AC1000' ticket (in-game cash) is coming on February 28, at the same ¥19,980 price.
February 28 also sees a PS Plus promotion coming to the country. Between February 28 and March 18, users in Japan can activate a free one-week subscription to the service.