Sunomata Castle (One-Night Castle) (墨俣城) — Japanese Castle Guide

Quick Facts

Admission: ¥200
Hours: 09:00 – 17:00
Nearest Station: Sunomata Station (Kintetsu Yoro Line from Ogaki Station)
Walk from Station: 15 min
Time Needed: 45 minutes–1 hour

Adults ¥200, children ¥100. The castle is a reconstructed museum tower.

Why Visit Sunomata Castle (One-Night Castle)?

Sunomata Castle is for Hideyoshi enthusiasts and anyone fascinated by the stories of the Sengoku era. The one-night castle legend is one of Japan's most beloved historical tales. Combine with Gifu Castle (30 minutes by car) for a full Nobunaga-Hideyoshi Mino Province itinerary.

Highlights — What to Look For

1

The One-Night Castle — History's Greatest Construction Legend

Sunomata Castle is famous throughout Japan for a legend: that Toyotomi Hideyoshi (then called Kinoshita Tokichiro) built a complete castle on this spot in a single night in 1566. The story holds that after two previous commanders failed, the young Hideyoshi prefabricated the castle components upstream and floated them down the Nagara River, assembling a complete fortress by morning. True or not, the story made Hideyoshi a legend in his own lifetime.

2

The Event That Launched Hideyoshi's Rise

Whether the one-night construction story is literally true, the strategic achievement at Sunomata was real: Hideyoshi successfully established a forward castle in enemy territory, giving Oda Nobunaga a bridgehead for his campaign to capture Inabayama Castle (later renamed Gifu). The success brought Hideyoshi to Nobunaga's attention and began the extraordinary rise of one of Japan's greatest historical figures.

3

The Nagara River — Strategic and Scenic

Sunomata Castle sits at the junction of the Nagara and Sai rivers on the Nobi Plain. The river confluence was strategically vital — controlling the river crossing meant controlling movement between Owari (Nobunaga's base) and Mino (the Saito clan's domain).

How This Castle Was Built to Fight

Visitor Tip

The 1991 concrete reconstruction is pleasant but historically misleading — it looks like a proper stone-walled castle, but the original was almost certainly a prefabricated timber fort. Visit for the legend and the Nagara River riverside atmosphere.

Castle Type

hirajiro

Flatland castle (built on a sandbank/levee at the confluence of the Nagara and Sai rivers — a fortified river crossing position on the Nobi Plain)

Layout Type

kakaku

Square-style — a compact fortified river crossing position

Main Tower (Tenshu)

Concrete reconstruction (1991) built to resemble an Azuchi-Momoyama period tenshu — not based on precise historical records. The original structure was almost certainly a temporary wooden palisade.

3 floors above ground

Stone Walls (Ishigaki)

nozurazumi — The original structure had no stone walls — it was a prefabricated timber palisade. The reconstruction gives a false impression of a stone-walled castle.

The original Sunomata position was almost certainly a quickly constructed wooden palisade and earthwork fort, not a stone-walled castle.

Moats

The Nagara and Sai rivers served as natural moats on multiple sides.

Key Defensive Features

River Confluence Position

The junction of two rivers created a natural moated position — water barriers on multiple sides. Any approach required river crossings, extremely difficult under fire.

Supply Route Control

The river position allowed Nobunaga to supply the castle by boat along the Nagara River from Owari territory.

Tactical Defense Simulator

Masugata Gate (Square Trap)

The Deadliest Gate in Japan

⚔ Attacking Force

1,000 / 1,000 troops

Phase 1: Approach

The attacking force crosses the moat and approaches the outer gate. Defenders hold fire, allowing the enemy to commit.

Castle Defense Layers

River Confluence — Natural Water Defense

· Nagara River (main channel)· Sai River (secondary channel)· Water approaches only

Forward Base — River Levee Position

· Prefabricated timber palisade (original)· Fortified river crossing control· Supply boat access from Owari

Historical Context — Sunomata Castle (One-Night Castle)

Sunomata's river-confluence position was an excellent short-term forward base. Its value was strategic position, not siege resistance. It was never intended as a long-term fortress.

The Story of Sunomata Castle (One-Night Castle)

Originally built 1566 by Kinoshita Tokichiro (later Toyotomi Hideyoshi)

Current form 1566 by Kinoshita Tokichiro

1566

Kinoshita Tokichiro (the future Toyotomi Hideyoshi) constructs a fortified position at the Nagara River confluence at Sunomata — reportedly overnight using prefabricated components.

1567

Nobunaga uses the Sunomata bridgehead to launch his campaign against Inabayama Castle. The Saito clan is defeated, and Nobunaga renames the castle town 'Gifu.'

1991

Ogaki City constructs a concrete castle tower on the Sunomata site as a museum and tourism attraction.

Seen This Castle Before?

novel

Taiko (novel by Yoshikawa Eiji)

Yoshikawa Eiji's celebrated 1941 historical novel devotes considerable attention to the Sunomata one-night castle episode.

TV

Various NHK Taiga Dramas featuring Hideyoshi

The Sunomata one-night castle scene is a staple of any Taiga Drama covering Hideyoshi's early career.

Did You Know?

The 'one-night castle' story is probably legendary rather than literally true — building a proper castle overnight is impossible. However, constructing a prefabricated timber palisade using pre-cut components floated downriver is plausible.
The modern concrete reconstruction (1991) imposes an anachronistic tenshu appearance on what was likely a small wooden fortification.
Hideyoshi's success at Sunomata is often cited as the decisive event in Nobunaga's Mino campaign — the forward base allowed Nobunaga to threaten Inabayama from a position the Saito could not easily eliminate.
The Nagara River at Sunomata is the same river that drains the famous Gifu cormorant fishing (ukai) stretch upstream.

Score Breakdown

Tourism Score

F 42/100

Accessibility 10 /20
Foreign-Friendly 6 /20
Historical Value 13 /20
Visual Impact 8 /20
Facilities 5 /20

Defense Score

F 25/100

Natural Position 8 /20
Wall Complexity 4 /20
Layout Strategy 5 /20
Approach Difficulty 5 /20
Siege Resistance 3 /20

Planning Your Visit

Best Time to Visit

Spring for cherry blossoms along the Nagara River levee. Year-round for historical interest.

Time Needed

45 minutes–1 hour

Insider Tip

Standing by the Nagara River at the confluence with the Sai River, you can understand exactly why this position was strategically vital and why Hideyoshi chose it for his overnight masterpiece.

Getting There

Nearest station: Sunomata Station (Kintetsu Yoro Line from Ogaki Station)

Walk from station: 15 minutes

Parking: Free parking at the castle park.

Open in Google Maps

Admission

Adult ¥200

Child ¥100

Adults ¥200, children ¥100. The castle is a reconstructed museum tower.

Opening Hours

Open 09:00 – 17:00

Last entry 16:30

Closed Mondays (or following Tuesday if Monday is holiday) and December 28–January 4.

Facilities

English guides
Audio guide
Wheelchair access
Restrooms
Gift shop
Food nearby

Official website

Nearby Castles

Ogaki Castle

大垣城 · Ogaki-jo

Ruins

📍 Gifu — Chubu

The crossroads castle where Ishida Mitsunari planned his doomed resistance — Ogaki stood at the hinge of the battle that made Tokugawa Japan.

D Tourism 52/100

D Defense 48/100

View →

Gifu Castle

岐阜城 · Gifu-jo

Ruins

📍 Gifu — Chubu

This is the mountain where Nobunaga declared he would rule Japan — and the view from 329 meters makes it easy to believe him.

C Tourism 68/100

B Defense 75/100

View →

Nagoya Castle

名古屋城 · Nagoya-jo

Ruins

📍 Aichi — Chubu

Nagoya Castle is mid-renovation — visit now for the stunning reconstructed palace, return in a few years for the completed wooden tower.

B Tourism 70/100

C Defense 65/100

View →

Frequently Asked Questions

How do I get to Sunomata Castle (One-Night Castle)?

The nearest station is Sunomata Station (Kintetsu Yoro Line from Ogaki Station). It is approximately a 15-minute walk from the station. Parking: Free parking at the castle park.

How much does Sunomata Castle (One-Night Castle) cost to enter?

Adult admission is ¥200. Children: ¥100. Adults ¥200, children ¥100. The castle is a reconstructed museum tower.

Is Sunomata Castle (One-Night Castle) worth visiting?

Sunomata Castle is for Hideyoshi enthusiasts and anyone fascinated by the stories of the Sengoku era. The one-night castle legend is one of Japan's most beloved historical tales. Combine with Gifu Castle (30 minutes by car) for a full Nobunaga-Hideyoshi Mino Province itinerary.

What are the opening hours of Sunomata Castle (One-Night Castle)?

Sunomata Castle (One-Night Castle) is open 09:00 – 17:00 (last entry 16:30). Closed Mondays (or following Tuesday if Monday is holiday) and December 28–January 4.

How long should I spend at Sunomata Castle (One-Night Castle)?

Plan on spending 45 minutes–1 hour at Sunomata Castle (One-Night Castle). Standing by the Nagara River at the confluence with the Sai River, you can understand exactly why this position was strategically vital and why Hideyoshi chose it for his overnight masterpiece.