An important tanto signed 'Gassan' in mamorigatana koshirae dating: machi Period (1392-1573) provenance: Japan, Nagasa of 16.6 cm. Sugata: hira zukuri iorimune musori; hamon: regular suguha in ko nie with sunagashi and kinsuji; hada: evident ayasugi; boshi: suguha, also sunagashi and with a short kaeri. Gilded metal habaki. Nakago mei: 'Gassan', ubu, kurijiri nakagojiri with kiri yasurime and two mekugi ana. In mamorigatana tachi koshirae, original from the Edo period, from the mid-18th century. The koshirae is decorated with Shizuoka clan kamons, silver and gold menuki, also representing clan kamons, and along the tsuka there are small bales of rice of gold, which are often seen before the god Daikokuten as a symbol of prosperity and abundance. In the original wooden box from the Edo period featuring a fragment of the history of this very rare weapon. Outside the inscriptions 'blessed tachi', 'signed Gassan', and 'placed to guard the house', while inside other inscriptions 'participation in the Sogen Shinto ritual', 'June month of the Kan'en era of the Kanota Hitsuji (1751) cycle', 'ceremony took place at the Hyuga temple in the Kinoe ne cycle' and 'Shintokuso Ebisu'. Middle Muromachi period. Sogen Shinto (literally 'original Shinto'), also known as Yoshida Shinto, was one of the main branches of Shintoism from the late Muromachi period until the Meiji era.It is a mamorigatana blessed at the Hyuga temple to protect family and home according to Sogen Shinto beliefs. It has been kept in its original box since 1751 and still has all its intact parts, this is one of the rare examples which allows us to know its history. The data preserved here provide a clear picture of the historical, family and social context. length 32.4 cm.