According to the story of tensonkorin (the descent to earth of the grandson of sun goddess) described in Nihonshoki, when Ninigi arrived at Kasasa-no-misaki Cape after descending to Takachiho no mine in Hyuga, Kotokatsukunikatsunagisa appeared and presented his own province to Ninigi.
日本書紀の天孫降臨の説話において、日向の高千穂の峰に天降ったニニギが笠狭崎に至った時に事勝因勝長狭神が登場し、ニニギに自分の国を奉っている。