Emperor Shirakawa (白河天皇) was the 72th imperial ruler of Japan and the first to ostensibly retire to a monastery, but in fact to continue to exert influence over his successor. This process would become known as cloistered rule.
... gyroscope is best when the precession of the gyroscope is supported and amplified by wrist motion.
It takes a while until one finds the "rolling" point, but the gyro ...