Shichseiken or Seven Star Sword is a Japanese sword that is 62.1cm in length and belongs to the Shitennou-ji Temple located in Shitennouji-ku, Oosaka City, Oosaka. It is designated as a National Treasure.
Shitennou-ji Temple was built by Shoutoku Taishi in 598 and it is sacred to Kukanzeonbosatsu.
Along with Heishishourinken, another sword that is also kept in Shitennou-ji, Shichiseiken is said to have been much loved by Shoutoku Taishi.
The name Seven Star Sword came from the fact that the sword is engraved with seven golden stars in the shape of a plough, using a technique called zougan. Additionally, the front side of the sword is carved with 5 asukagumo, using the golden zogan technique and at both ends of the seven stars, there are three V-shaped stars and three stars aligned with a blue dragon and a white tiger. The back of the sword is also engraved with asukagumo, seven stars, a blue dragon and a white tiger.
Shichiseiken, by comparison to Heishishourinken, has a more noticeable residual metal substance called suragu, however, it uses a finer raw metal called koitame-hada and it has a hososugu blade.
Shichiseiken is a historically valuable sword that has been carefully preserved from an ancient period.