Keisaku

 ( Buddhist Ritual Implements ) 

In Zen Buddhism, the keisaku (Japanese: 警策, Chinese language: 香板, xiāng bǎn; kyōsaku in the Soto school) is a flat wooden stick or slat used during periods of Zen meditation to remedy sleepiness or lapses of concentration. This is accomplished through a strike or series of strikes, usually administered on the meditator's back and shoulders in the muscular area between the shoulder and the spine. The keisaku itself is thin and somewhat flexible; strikes with it, though they may cause momentary sting if performed vigorously, are not injurious.

• Jikijitsu
• Shippei
• Sluggard waker – a similar custom and tool used in 18th century British churches

• G. Victor Sōgen Hori (1998). 9780520213012, University of California Press. ISBN 9780520213012