In 1983, during a survey associated with the construction of farm roads, a piece of Kofun period Sue ware earthenware was discovered on a path between paddy fields.

The bronze swords show no damage, so it is thought that it was buried relatively early after they were made, but the exact date or purpose of the burial is unknown.

[2] Following discovery of the swords, the Shimane Prefectural Board of Education determined that there was a high possibility that there were more unexcavated artifacts and ruins in the area.

[2] Furthermore, 16 bronze spears were buried on the east side of the same burial pit as the dotaku, with their blades raised up and their tips alternating.

The site is approximately five minutes by car from Shobara Station on the JR West San'in Main Line.