What is "nulgupjisin"

Nulgubjishin ( Hangul: 눌굽지신), also known as Nadgarishin ( Hangul: 낟가리신) is the deity of Nulgub, an area where grain are stored and ground into flour, in Korean mythology, as well as being the deity of grain. He is considered the weakest of the Gashin, the household deities of Korean mythology. There is thus no Gut (shamanistic ritual) nor Bonpuli (a biography of a deity) dedicated to Nulgubjishin.