Also called "Bansho Rojin Hyosho Tendokaku Osho Shoko Shoyoan Roku," it is a collection of koan (questions that a master gives to a person who seeks the secret of Zen, which take a great deal of thought and meditation to solve) and is highly evaluated in the Soto sect.
万松老人評唱天童覚和尚頌古従容庵録ともいう、曹洞宗で重んずる公案集である。