Sawarabi Gothic (さわらびゴシック) is a Japanese font by mshio. Carefully designed for high legibility, it works well in small text sizes. It already has many hiragana, katakana, ruled lines, and so on, but it does not yet have enough kanji glyphs.
6,945 glyphs are included, but only 4,469 kanji are available in this version. The project is under active development.
There is also another related family, Sawarabi Mincho
Learn more at sawarabi-fonts.osdn.jp