Smiling Zen - In Search for Profound Significance of Living was written by Toru Matsui and published by Chobunsha, Inc, Tokyo on April 30, 1998. It was based on his lecture series broadcast by NHK (Japan Broadcasting Corporation, Japans national public broadcasting organization). He tells how to live with smiles (taken from Zen koan of Mahakashyapas smile at the Buddhas holding up a lotus flower) through Zen practice. He explains why and how to practice Zen following Tendas Shshikan (Abridged Version of Calming and Visioning) with his profound experience and explications about questions arising from it so that anyone can understand and actualize.
