In the context of , "Sanzen (Moment of Truth)" refers to a pivotal track from the 1964 album Music for Zen Meditation and Other Joys by American jazz clarinetist Tony Scott , featuring Japanese masters Hōzan Yamamoto (shakuhachi) and Shinichi Yuize (koto).

This track is the eighth selection on what is widely considered the first "New Age" or ambient album. It captures a largely improvised interaction between the three musicians, designed to evoke the high-stakes, intimate atmosphere of a Zen interview.

: Listeners describe the music as "sparse" and "sublime," noted for its unhurried pace and "meditative space".

: Reviewers from Amazon and Discogs praise it as a "soothing" experience that "transport[s] one's mental focus to higher planes". Music for Zen Meditation [CASSETTE] - Amazon UK

: The track relies on ancient scales and melodic motifs, featuring an intricate interplay between the clarinet and traditional Japanese instruments.