Hachimanyama Castle

Overview

Hachimanyama Castle (八幡山城, Hachimanyama-jō) stood on a hill above Ōmihachiman, a town on the eastern shore of Lake Biwa in what is now Shiga prefecture. It was built in 1585 and dismantled in 1595, so its life as a working castle lasted only ten years. For that decade it was the seat of Toyotomi Hidetsugu, nephew of the unifier Toyotomi Hideyoshi. The site is listed among the Continued Top 100 Japanese Castles (続日本100名城, Zoku Nihon Hyaku-meijō), a 2017 selection of castles chosen to follow the original Top 100.

History

The castle was founded in 1585, in the thirteenth year of the Tenshō era (天正, Tenshō), during the Azuchi–Momoyama period. That period, running from 1573 to 1603, takes its name from the castles of two warlords: Oda Nobunaga's Azuchi Castle and Toyotomi Hideyoshi's Momoyama Castle. Hachimanyama belongs to the same generation of hilltop strongholds built by the men who were consolidating Japan under a single authority.

Hideyoshi installed his nephew Hidetsugu at Hachimanyama as part of a wider settlement of the region around Lake Biwa. The castle overlooked the lake and the roads along its shore, giving its lord control of a commercially busy corridor between the Kyoto area and the provinces to the east. Hidetsugu was a senior figure in the Toyotomi regime, and the castle was built to reflect that standing.

The castle's end came in 1595, when it was abandoned. Hidetsugu died that year, and with its lord gone the castle was given up rather than transferred to a new master. In ten years it had gone from a newly built headquarters to a ruin.

What Stands There Today

What remains is a castle ruin: earthworks, terraces and foundations on the hill, rather than standing buildings. The site is in Ōmihachiman, and the town below preserves the layout of a castle town (城下町, jōkamachi) laid out in the years when the castle was occupied.

Zuiryū-ji (瑞龍寺, Zuiryū-ji), a temple in the area, is closely associated with the castle site and is the reference point most often used to locate it. The hill itself is the main attraction: the walk up passes the successive terraces of the former compound, and the top gives a view over Lake Biwa and the town.

The Name in Japanese

The full name is 八幡山城, read はちまんやまじょう in kana and written Hachimanyama-jō in romaji. It breaks into four kanji.

八 — read hachi here — means "eight". It is one of the most basic numerals in Japanese and appears in an enormous number of place names and personal names.

幡 — read man here — means "banner" or "flag", specifically a cloth standard flown as a marker. In ordinary modern Japanese it is rare on its own; it survives mainly inside names.

Together, 八幡 (Hachiman) is the name of a deity: Hachiman, the god of war and the protector of warriors, whose worship was widespread among the samurai class. The name is usually explained as "god of the eight banners", a reference to the banners said to have flown before the deity. Hachiman shrines (八幡宮, Hachiman-gū, or 八幡神社, Hachiman-jinja) are among the most common in Japan, and a castle built under his name carried a claim of divine protection.

山 — read yama — means "mountain" or "hill". Here it is the everyday word for a wooded elevation, which is exactly what the castle sat on.

城 — read jō — means "castle". In this word the character takes its on'yomi reading, the pronunciation borrowed from Chinese, which is the usual reading when 城 ends a castle name: 大坂城 Ōsaka-jō, 姫路城 Himeji-jō, and so on. On its own, the same character can be read shiro, the native Japanese word for a castle.

So the name as a whole means "Castle of the Eight-Banner Mountain" — a hill named for the war god, crowned by a castle. The pattern is common in Japanese castle names: a place name, often a hill, plus 城. Readers who know the town name Ōmihachiman (近江八幡) will recognise the same 八幡 inside it; the town takes its name from the same deity.

Visiting and Context

Hachimanyama is a ruin site rather than a reconstructed castle, so it rewards a walk rather than a tour of interiors. The climb up the hill is the point: the terraces show how the compound was cut into the slope, and the summit view explains why the position was chosen, with Lake Biwa and the flat land around it spread out below.

Ōmihachiman itself is the other half of the visit. The old merchant quarter retains its grid of streets and canals from the castle-town years, and the town is also known for its own local history and crafts. The castle hill and the town below are best understood together: the town exists in its present shape because of the decade when Hachimanyama was occupied.

For readers following the Azuchi–Momoyama period, Hachimanyama is a useful stop because it belongs to the same short, intense span as the great castles of Nobunaga and Hideyoshi. It was built in 1585 and gone by 1595 — a reminder that many of the castles of that era were built fast, held briefly, and abandoned when the politics that produced them changed.