Hakuryu Sojun Mel Weitsman (July 20, 1929 – January 7, 2021), born Mel Weitsman, was an American Buddhist who was the founder, abbot and guiding teacher of Berkeley Zen Center located in Berkeley, California. Weitsman was a Soto Zen roshi practicing in the lineage of Shunryu Suzuki, having received Dharma transmission in 1984 from Suzuki's son Hoitsu. He was also a co-abbot of the San Francisco Zen Center, where he served from 1988 to 1997. Weitsman was also editor of the book Branching Streams Flow in the Darkness: Zen Talks on the Sandokai, based on talks given by Suzuki on the Sandokai.