Togusan Kofun

Togusan Kofun is a burial mound in 妻鳥町, 四国中央市, 愛媛県, Japan. It is classified as a megalithic mound with integral stones and is dated by typological estimate to 250 CE to 650 CE. The mound stands near the summit of the independent hill 東宮山 on the inland slope of the 法皇山脈. A 春宮神社 now stands on its northern side.

The present mound is oval, measuring a maximum diameter of 14.6メートル and a height of 3.3メートル, although the surrounding edges have been cut down and the original mound was probably larger. Its gently sloping northeastern side suggests that it may originally have been a 前方後円墳 facing northeast. Its burial chamber is a 両袖式横穴式石室 opening to the northwest and is now buried. A 組合式石棺 on the summit was moved there between 1855-1860年.

The chamber contained a 内行花文鏡 inscribed 長宜子孫, a 広帯二山式冠, two earrings, weapons, horse fittings and pottery. Excavations were carried out in 1894年 and surveys in 1959年 and 2013年. The mound is considered to have been built in the 6世紀代, during the MT85型式期, and was probably the tomb of a powerful local leader. It is also important for studying changes in elite burials across 宇摩平野.

The occupant is unknown. 宮内庁 designated it as 「妻鳥陵墓参考地」 for 木梨軽皇子, a son of 第19代允恭天皇, and local tradition has long identified it as his tomb. The historical accounts give no clear burial place, so the identification lacks firm evidence. Two other 箱式石棺 survive on and near the mound; one contained a 銅矛 from the middle-to-late 弥生時代.

Togusan Kofun is a megalithic mound (tumulus with integral stones) in Shikokuchūō-shi, Japan. A typological estimate: 250 CE to 650 CE. No English Wikipedia article exists for it; the full text below is the Japanese article "東宮山古墳", shown in the original language.