Bitchu Matsuyama Castle

Japan's only mountain castle with an Edo-period keep, 430 m up Mount Gagyu. On early mornings from autumn to spring it can float on a sea of clouds.

The only surviving keep on a mountain

Bitchu Matsuyama Castle stands on Mount Gagyu in Takahashi, Okayama Prefecture. Its tenshu (the keep, the tall central building of a castle) sits 430 metres above sea level. Only 12 castles in Japan still have a keep built in or before the Edo period (they are known as the "12 original keeps"), and this is the only one of them that is a yamajiro, a castle on top of a mountain.

The first castle here is said to have been built in 1240 by Akiba Saburo Shigenobu. The present keep dates from a major rebuilding carried out by the castle lord Mizunoya Katsumune between 1681 and 1683. The keep, the nijuyagura (a two-storey watchtower) and parts of the earthen walls are designated Important Cultural Properties of Japan.

Stone walls on bare rock and a small keep

As you climb, you come to stone walls built straight on top of huge boulders more than 10 metres high. With natural rock faces pressed into service as defences, the place still feels like an impregnable fortress. The walls are made of granite quarried locally.

The keep has two storeys and is about 11 metres tall. It is the smallest of the 12 original keeps, but it stands higher than any of them. You can go inside and look round an Edo-period wooden keep.

During the torrential rains in western Japan in July 2018, a cat that had gone missing from its owner's home turned up at the castle a week later. The cat, Sanjuro, stayed on and has become the castle's star as its "cat lord".

Seeing it float on a sea of clouds

When conditions are right, mist settles in the basin below and the castle looks as if it is floating on a sea of clouds. According to Okayama Prefecture's tourism website, this can be seen early in the morning from around September to April.

The classic view is not from the castle itself but from the Unkai Observation Deck (Bitchu Matsuyama Castle Observation Deck), about 1 km away, which looks at the castle from the side. Most people drive there; it takes about 20 minutes from Takahashi Station.

Getting there

The nearest station is Bitchu-Takahashi on the JR Hakubi Line. Walking from the station to the castle takes about 90 minutes, so most people take a taxi or a reservation-only shared sightseeing taxi to Fuigo Pass, eight-tenths of the way up, and walk the mountain path from there to the keep in 20 to 30 minutes.

If you drive, park at the Shiromibashi Park car park, halfway up, and take the shuttle bus to Fuigo Pass. On days the bus runs, private cars cannot go from Shiromibashi Park to Fuigo Pass. The Fuigo Pass car park started charging from September 2026, and bus fares have also been revised. Check the official website for fees, operating days and castle opening times.

Tips

• From Fuigo Pass to the keep is a mountain path of slopes and stone steps. Wear comfortable shoes and, in summer, carry a drink. The official website also warns visitors to watch out for hornets.
• On 12-16 October, 16-20 November and 23-27 November 2026, the footpath between above Takahashi High School and Fuigo Pass is closed all day for tree-felling work (the keep stays open). If you plan to walk up from the foot of the hill during these periods, check the detour route on the official website.
• The sea of clouds depends on the weather and does not appear every morning. If you want to see it, staying overnight in Takahashi and heading to the observation deck early in the morning gives you some leeway.

Sources

• 備中松山城【公式】 (opens in a new tab)
• 備中松山城 遊歩道の通行止めについて＜高梁高校上-ふいご峠間＞ (opens in a new tab)
• 【重要】駐車場有料化に関するご案内 - 備中松山城 (opens in a new tab)
• 備中松山城へのアクセス - 高梁市公式ホームページ (opens in a new tab)
• 備中松山城｜岡山観光WEB【公式】 (opens in a new tab)
• 松山城 (備中国) - Wikipedia (opens in a new tab)

Updated 30 September 2026. Opening hours and prices change, so check the official site before you go.