I've posted Tsukurimashou 0.8, the latest version of my Japanese-language font project. This version contains 1502 kanji, including all through Grade Four. There are relatively few infrastructure changes for the fonts in this version, but Kleknev is new in this release (still at alpha status) and IDSgrep 0.4, released a few days ago and included in this package, contains some new and exciting speed enhancements.
UPDATE: I presented Tsukurimashou at TUG 2013 in Tokyo this October. You can read my slides (PDF file) on the conference Web site, and see some photos from my trip in my photo gallery. The paper will appear in TUGboat 2013.3, which will be posted on TUG's Web site (initially members-only, eventually open-access, or visit your library) in the near future.