Takuan Sōhō was a Japanese Buddhist prelate during the Sengoku and early Edo Periods of Japanese history. He was a major figure in the Rinzai school of Zen Buddhism. Noted for his calligraphy, poetry, tea ceremony, he is also popularly credited with the invention of the takuan pickled radish.

The Rinzai school ,named after Linji Yixuan is one of three sects of Zen in Japanese Buddhism, along with Sōtō and Ōbaku. The Chinese Linji school of Chan Buddhism was first transmitted to Japan by Myōan Eisai. Contemporary Japanese Rinzai is derived entirely from the Ōtōkan lineage transmitted through Hakuin Ekaku (1686–1769), who is a major figure in the revival of the Rinzai tradition.