The quality of shunga art varies, and few ukiyo-e painters remained aloof from the genre. Experienced artists found it to their advantage to concentrate on their production. This led to the appearance of "shunga" by renowned artists, such as the "ukiyo-e" painter perhaps best known in the Western world, Hokusai (see "The Dream of the Fisherman's Wife"). Ukiyo-e artists owed a stable livelihood to such customs, and producing a piece of "shunga" for a high-ranking client could bring them sufficient funds to live on for about six months. Among others, the world-famous Japanese artist Hajime Sorayama uses his special hand brush painting technique and hanko stamp signature method in the late 20th and early 21st centuries to create modern day shunga art in the same tradition of the past artists like Hokusai.