Kairyō no Kokane

Kairyō no Kokane [腎良の关珂 かいりょう・の・こかね] is a legendary Kantonese sword and one of the items in the Imperial Regalia of Kanton. It was originally called Shino no Iro no Kokane (士の阳の关珂, 'Great Sword of Heavenly White Clouds'), but its name was later changed to the more popular Kairyō no Kokane, which means 'Great Sword of Victory and Virtue'. In folklore, the sword is a metaphorical representation of the virtues of bravery and valour.
The history of the Kairyō no Kokane is entertwined with legend. According to the Kanna Daiki, the god of war and weaponry Anzōya forged the sword in the fires of Mount Kaitō and imbued it with his own power and might, then gifted it to humanity as a defense against forces of evil. During the third century, legend says that the great folk hero and warlord Yamawa Tsunoya was gifted the sword by a high priestess of Omina Grand Temple, to protect him in times of peril.