biography of osen keisan (1751-1828) osen keisan, a renowned japanese artist, was born in osaka in 1751 and remained active until his passing in 1828. during the late edo period, he left an indelible mark on the world of art with his captivating paintings and prints. early life and training osen keisan's artistic journey began under the tutelage of maruyama okyo, a prominent figure in japanese art. this mentorship not only honed his sk…