Kokaji

Kokaji (小鍛冶, The Swordsmith) is a Japanese Noh play by an unknown author.

[3] Emperor Ichijo (980-1011) receives a message from the kamis in his dreams, telling him to commission a special sword from Sanjō no Kokaji Munechika.

Munechika receives the messenger, but he is hesitant to accept the request, as he has no smithing partner at his own level.

The boy recounts several episodes from Chinese and Japanese history and mythology related to swords.

He then tells Munechika to trust him and starts making the preparations for forging the sword, and disappears.