was one of the first suiboku (ink wash) style Zen Japanese painters in the Muromachi Period (15th century). He was probably also a teacher of Tenshà  Shà «bun at the Shà Âkoku-ji monastery in Kyoto.
The best known of his paintings belongs to Taizà Â-in, a sub-temple of Myà Âshin-ji in Kyoto, which is entitled Catching a Catfish with a Gourd (c. 1413). It shows a comical-looking man fishing against a background of a winding river and a bamboo grove. It is thought to have been inspired by a riddle set by the Ashikaga shà Âgun, "How do you catch a catfish with a gourd?" It can be viewed as a piece of Zen humour, or as a kà Âan in visual form designed to provoke the viewer into new ways of "seeing". Josetsu was an amazing figure in ink painting at that period of time and also influenced many painters as well.