Part of a traditional armour set known as Tosei—gusoku in Japanese, once owned by the great Tachibana Muneshige, revered as the unrivalled champion warlord of the Western realms. Muneshige rose to fame fighting under the Otomo clan, and continued to rack up victories in Kyushu against the Shimazu, Katoh, and Kuroda clans after joining Toyotomi Hideyoshi's forces, clad in this distinctive armour all the while. The helmet is based on a modified foreign—style design, topped by a huge ornament evoking a gleaming full moon. The backside is further decorated with a feathered plume. The moon ornament is also called a wanuki, literally "holed circle," and symbolises the divine protection of the Bodhisattva Marici.
This thick, one—piece breastplate is based on a foreign design, lacquered in the Japanese style with the same moon motif as the helm. The left shoulder features a relief that complements the chest design. The moon ornamentation is also called a wanuki, literally "holed circle," and symbolises the divine protection of the Bodhisattva Marici.
The gauntlets are asymmetrically designed; the left hand is armoured in thick iron plate, while the right is lighter and thinner, leaving the fingers exposed for ease of handling bows and other weapons.
Waist and thigh protection is constructed from thick plates based on foreign armour designs, covered with more plating connected and covered by cording.
The leg protection covers the shins with overlapping iron plates that are articulated with cording on the back rather than front side to improve durability.