Koitsu.com is compiled and managed by Ross Walker as a public educational resource for all things related to the master Shin Hanga woodblock print artist Tsuchiya Koitsu. The resources available on this site include research articles as well as the web's only comprehensive database-enabled catalogue of Koitsu prints, the The Catalogue Raisonne of Tsuchiya Koitsu. Note: The artist Rakusan Tsuchiya is a completely different artist.
Ross is also the proprietor of Ohmi Gallery, the gallery of Ross's Japanese art collection. Artists include Tsuchiya Koitsu, Torii Kotondo, Ito Shinsui, Ohara Shoson (Koson), Bakufu Ohno, Shiro Kasamatsu, Tomikichiro Tokuriki, Takeji Asano, Chikanobu Yoshu, Utagawa Kunisada, Kunisada II, Gekko, Nobukazu, Eiichi Kotozuka, Sanzo Wada, Shuzo Ikeda, Tamami Shima, Kobayashi Kiyochika, and Kaoru Kawano.