Muso Soseki (1275–1351) was a Rinzai Zen Buddhist monk and teacher, and a calligraphist, poet and garden designer. The most famous monk of his time, he is also known as Muso Kokushi ("national Zen teacher"), a honorific conferred to him by Emperor Go-Daigo.

Thomas Yuho Kirchner was born in Baltimore, Maryland, in 1949. He went to Japan in 1969 to attend Waseda University in Tokyo for a year, after which he remained in Japan to study Buddhism. He spent three years training under Yamada Mumon as a lay monk at Shofuku-ji before receiving ordination in 1974. Following ordination he practiced under Minato Sodo Roshi at Kencho-ji in Kamakura and Kennin-ji in Kyoto. Following graduate studies in Buddhism at Otani University he worked at the Nanzan Institute for Religion and Culture in Nagoya and subsequently at the Hanazono University International Research Institute for Zen Buddhism. He presently lives at Tenryu-ji in Arashiyama, Kyoto. Among his publications are the Record of Linji, Dialogues in a Dream, and Entangling Vines.