Takeda Castle Ruins, Hyogo

Castle ruins where only stone walls remain on a 353.7m peak. On autumn dawns they seem to float on a sea of clouds, earning the name "castle in the sky".

Terraced stone-walled enclosures of Takeda Castle ruins seen from above — Photo: 投稿者が撮影 (opens in a new tab), Public domain, via Wikimedia Commons

Stone base of the former main keep at Takeda Castle ruins among spring trees — Photo: 投稿者が撮影 (opens in a new tab), Public domain, via Wikimedia Commons

A castle of stone walls on a mountaintop

Takeda Castle Ruins sit on a summit 353.7m above sea level in Asago, Hyogo Prefecture. None of the buildings survive, but stone walls spread across the top of the mountain, and the site is a designated national Historic Site. It is also one of Japan's "Top 100 Castles".

According to Asago City, the castle is said to have been founded in the Kakitsu era (the 1440s), when the Otagaki family built it on the orders of their lord Yamana Sozen, military governor (shugo) of Tajima Province, today's northern Hyogo. The Otagaki family held the castle for seven generations, until it fell in 1580 to Hashiba Hideyoshi (later known as Toyotomi Hideyoshi) during his campaign against Tajima.

The last lord and the stone walls

The stone walls you see today are thought to have been completed under Akamatsu Hirohide, who became lord of the castle in 1585. He is said to have encouraged silk farming and lacquerware making and to have been loved by the people of his domain.

After the Battle of Sekigahara in 1600, however, Hirohide was accused of setting fire to the castle town during the attack on Tottori Castle and forced to take his own life, and Takeda Castle was abandoned. For more than 400 years since, only the stone walls have remained on the mountain.

The "castle in the sky" and the sea of clouds

The ruins became famous thanks to unkai, a "sea of clouds": cloud or mist that, seen from above, spreads out like an ocean. It usually appears from late September to late November, between dawn and about 8am, when several conditions come together, such as clear skies and light winds.

If you want a photo of the castle floating on the clouds, the viewpoints at Ritsunkyo, on the mountain opposite across the Maruyama River, are the place to go. Even at times when you cannot climb to the ruins, you can look across at them in the morning from here.

Getting there

The nearest station is Takeda Station on the JR Bantan Line. A tozando (hiking trail) behind the station takes you to the ruins in about 40 minutes on foot. The Tenku Bus (run by Zentan Bus) goes from the station to a stop halfway up the mountain, and from there it is about a 20-minute walk to the entrance of the ruins.

The road up the mountainside is narrow, so ordinary cars are not allowed. Drivers park at the Yamashiro no Sato tourist facility or in the free car parks in the old castle town, then take the Tenku Bus or walk. Allow 30 minutes to an hour to look round the ruins.

Tips

Every year the site closes for winter from 4 January to the end of February, and you cannot enter the ruins. Visiting hours also change with the season, so check the official website.
Entry is banned when there are warnings for heavy rain, flooding or storms, when a typhoon is approaching, or when snow or ice make it dangerous.
The sea of clouds is hard to predict yourself, so use the unkai forecast on Asabura, the local tourism website. Wear comfortable shoes such as trainers and bring something to drink. Climbing on the stone walls is forbidden.

Sources

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

Takeda Castle Ruins