Inuyama Castle: One of Japan's Original Wooden Keeps

Explore Inuyama Castle in Aichi, a National Treasure keep above the Kiso River, with its history, rooftop views, castle town and festival.

Published October 17, 2026 at 9:13 PM JST | By Tokyo Paul

Quick answer: Inuyama Castle in Aichi is a National Treasure keep above the Kiso River and one of only twelve pre-modern castle keeps still standing in Japan. A balcony around the top lets visitors walk a full circle for views, and Nagoya is about thirty minutes away by train.

A Castle You Can Truly Climb

Many of Japan's castles are modern reconstructions in concrete, but a precious few are original wooden keeps that have survived for centuries. Inuyama Castle in Aichi Prefecture is one of them. Perched on a small hill above the Kiso River, its compact main tower, called the tenshu, is a National Treasure and one of only twelve pre-modern keeps still standing in Japan. Travelers who like to feel old timber underfoot, and who enjoy a good view at the end of a climb, often rank it among the most rewarding castle visits in the country.

This guide covers the castle's history, what to expect inside, the charming castle town and festival nearby, and practical tips for reaching Inuyama from Nagoya. Opening hours, fees and festival schedules can change, so please confirm current details through the official city tourism information before you travel. With that in mind, let's start with the story of how this small keep came to be treasured.

A Keep With a Long Story

The castle itself dates to 1537, and the Oda clan rebuilt an older fortification on the hill into the castle seen today, during the Sengoku period. The dating of the main tower itself is a topic that historians continue to discuss. The government lists the tenshu as having been built in 1601, while tree-ring studies point to timber from the 1580s, and work is thought to have continued until around 1620. Because of this, it is considered a candidate for the oldest surviving keep in Japan, a title that adds to its appeal.

After the Battle of Sekigahara in 1600, Tokugawa Ieyasu gave the castle to the Owari Domain, one of the most important branches of the Tokugawa family. The Naruse family, who were vassals of the Owari Tokugawa, then looked after the castle. The Naruse family owned it privately from 1895 until 2004, when a non-profit foundation took over its care, and that long, careful stewardship has helped the tower survive. It was designated a National Treasure in the twentieth century and today ranks among just five castle keeps to hold that status.

Climbing to the Top

The tenshu is small by the standards of famous castles, but that makes it wonderfully intimate. Inside, the stairs are steep and narrow, and the whole interior has the cozy, creaking feel of an old timber building. Visitors remove their shoes at the entrance and carry them in a bag, so wearing socks makes the climb more comfortable. Because the stairs are steep, take your time, hold the rails, and let people pass if the line builds up. Those with limited mobility may find the interior challenging, but the castle grounds and the view from below are still enjoyable.

The reward comes at the top. A narrow balcony runs around the upper floor, and visitors can walk a full 360 degrees around it, something that is not possible at the other four National Treasure keeps. From here you can look out over the castle town and across the Kiso River. The river forms the border between Aichi and Gifu prefectures, so the view takes in two regions at once. The panorama makes the climb well worth the effort.

Castle Town and Festival Pleasures

At the foot of the castle lies a lovely, walkable castle town. The main street, called Honmachi, is lined with food stalls, craft shops and kimono rental shops, so visitors can stroll in traditional dress. Snacks and sweets are easy to sample as you wander. The street tends to get busier as the morning goes on, so arriving earlier gives you more space to browse. Nearby, Haritsuna Shrine is the home of the Inuyama Festival, and Sanko Inari Shrine, known for its heart-shaped prayer plaques, adds a cheerful touch.

The Inuyama Festival is held in early April, and it is the highlight of the town's calendar. Large decorated floats with mechanical puppets, called karakuri, are pulled through the streets, and the festival was recognized by UNESCO as part of the Intangible Cultural Heritage in 2016. Even if you cannot visit during the festival, the Donden Kan museum displays festival floats throughout the year, so you can see their fine craftsmanship up close. Exact festival dates change from year to year, so look at the official schedule if you want to plan around them.

Beyond the Castle and Getting There

The Kiso River is a major part of Inuyama's identity. The stretch of rapids upstream, known as the Nihon Rhine, offers boat tours, and cormorant fishing, a traditional method that uses trained birds to catch fish, is held for visitors from about June to October. Urakuen, a garden near the castle, includes the teahouse Jo-an, itself a National Treasure, and is a peaceful place to pause. A bit farther out, Meiji Mura is an open-air museum filled with buildings from the Meiji and Taisho eras, including the entrance and lobby of the former Imperial Hotel in Tokyo designed by Frank Lloyd Wright. Other attractions include the Little World Museum of Man and Japan Monkey Park.

Getting to Inuyama is simple. From Nagoya, the Meitetsu line takes about twenty-five to thirty minutes to Inuyama Station or Inuyamayuen Station. Inuyamayuen Station offers a pleasant riverside walk to the castle, while Inuyama Station leads you through the castle town. Weekday mornings are generally the least crowded times, and spring and autumn are the most popular seasons. Wear shoes that are easy to slip off, bring a small bag for them, and carry a bottle of water.

Plan about half a day for the castle and town, or a full day if you want to add the garden, the river and a museum. Rainy days can make stairs slippery, so be careful in wet weather, and in summer a hat and light clothing will help you enjoy the climb. Combined with a Nagoya stay, Inuyama makes a rewarding addition to a Chubu region itinerary.

Quick Takeaways

Inuyama Castle is a compact National Treasure keep overlooking the Kiso River, with a story that stretches back to the sixteenth century and a unique 360 degree balcony view. The castle town offers snacks, crafts and kimono rental, and the Inuyama Festival brings floats and puppets to the streets each spring. The river, the garden and the Meiji Mura museum add plenty to explore nearby.

Come early, wear shoes that are easy to remove, and take the steep stairs slowly. Check the official information for hours and events, and enjoy this lovely corner of Aichi at an easy pace. It is a piece of living history that delights visitors of all ages.

Frequently Asked Questions

How do I get to Inuyama Castle from Nagoya?

Take the Meitetsu line from Nagoya, which takes about twenty-five to thirty minutes to Inuyama Station or Inuyamayuen Station. Inuyamayuen offers a riverside walk to the castle, while Inuyama Station leads through the castle town. Weekday mornings are usually the least crowded.

Is Inuyama Castle a National Treasure?

Yes. The main tower is designated a National Treasure and is one of only five castle keeps to hold that status. It is also one of twelve original pre-modern keeps in Japan, and a candidate for the oldest.

When is the Inuyama Festival?

The Inuyama Festival is held in early April, with large decorated floats and mechanical puppets. UNESCO recognized it as Intangible Cultural Heritage in 2016. Exact dates change each year, so check the official schedule. The Donden Kan museum shows festival floats year-round.

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