Japanese TrueType fonts distributed by Infomation-technology Promotion
Agency (IPA) Japan.

IPAex Mincho, the integration of IPA Mincho and IPA P Mincho, and
IPAex Gothic, the integration of IPA Gothic and IPA P Gothic are newly
developed. This new font series is strictly following Japanese
printing font tradition, namely, Japanese characters (Kanji, Kana and
punctuation marks) are full width mono-space pitch, and Western
characters are proportional pitch.

WWW: http://ossipedia.ipa.go.jp/ipafont/index.html