Later, the Ame no Murakumo no Tsurugi Sword in the Imperial court was lost with the Emperor Antoku, who entered the water, so "Heike Monogatari" (The tale of the Heike) tells that Yamata no Orochi became the Emperor Antoku and came to take back the Ame no Murakumo no Tsurugi Sword.
のちに宮中の天叢雲剣は入水した安徳天皇とともに失われるが、『平家物語』は、これを八岐大蛇が安徳天皇となって天叢雲剣を取り返しに来たとする。