What is "osashizu"

In the Japanese religion Tenrikyo, the Osashizu is a compilation of the continued revelations of Tenri-O-no-Mikoto (God) through Izō Iburi, the first Honseki after the founder Oyasama "hid her physical being." It was compiled into annual anthologies and is considered secondary only to Ofudesaki in importance. It is also much longer than Ofudesaki.