Artist, [[eroge]] illustrator.

Japanese name: 川合 正起 (Kawai Masaki)
Other nickname: うさＦ (Usa F)
Site name: うさＦ大行進

h4.See also

* Home page: http://plaza.rakuten.co.jp/usafroom/
* Pixiv: https://www.pixiv.net/member.php?id=4353502
* Twitter: https://twitter.com/sahomasaki
* Hand-held Power Tools Personification Blog: http://ameblo.jp/sahomasaki/
* Erogamescape: http://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/creater.php?creater=351 
* Wikipedia article(JP): "http://ja.wikipedia.org/wiki/川合正起":http://ja.wikipedia.org/wiki/%E5%B7%9D%E5%90%88%E6%AD%A3%E8%B5%B7 
kawai masaki