Ch: Lanzan weiyu 懶瓚煨芋. A Zen 禅 (Ch: Chan) painting subject depicting the late 8th century Chinese Zen priest Lanzan (Jp: Raisan 懶瓚) baking sweet potatoes. His real name was Mingzan (Jp: Myōsan 明瓚) and he is said to have lived in retirement deep in the forests of Mt. Heng 衡山 in Hunan 湖南. The Tang dynasty emperor Decong (Jp: Tokusō 徳宗, 742-805) heard of Lanzan's purity and sent a messenger to invite him to court. The messenger arrived to find Lanzan roasting sweet potatoes over a fire of cow-dung. Lanzan completely ignored the messenger, preferring his life of humble reclusion to the temptations of court life. Although the subject falls within the category of paintings of Zen hermits and eccentrics *sansei-zu 散聖図, the nature of the theme is also related to paintings of high-minded Confucian recluses such as Taigongwang (Jp: *Taikōbō 太公望) and the Four Graybeards of Mt. Shang (Jp: *Shōzan shikō 商山四皓). A screen painting of the subject by Hasegawa Tōhaku 長谷川等伯 (1539-1610) at Myōshinji Tenkyūin 妙心寺天球院 in Kyoto, is well known.