Nishihira Tadashi, one of Japan''s leading philosophers, introduces the deeply experiential philosophy of no-mind (mushin). In everyday Japanese, mushin is when one loses oneself in the reality of the present and becomes one with it, resulting in one-s best performance. However, behind this everyday use is a concept that touches the core of Japanese spirituality. This book explores no-mind in its dynamic complexity. It is both the letting go of the calculations of mind and at the same time the arising of a vibrant consciousness in unity with reality. This gives rise to various tensions: Is it about negating or affirming self? Is stillness or activity? How does it relate with social ethics, or religious transcendence? And what is stopping no-mind from descending into mere mindlessness? These tensional facets are explored through philosophy and history of thought in Japan, from pre-Buddhist Japanese thought, to Zen Buddhism in D.T. Suzuki and Toshihiko Izutsu, to swordsmans