No. 074ChugokuYamaguchi

Iwakuni Castle

岩国城

Reconstructed buildings

Iwakuni Castle stands above the Nishiki River. The modern keep and original keep platform offer two different views of its history.

The reconstructed keep of Iwakuni Castle on its hill
The reconstructed keep of Iwakuni Castle on its hillPhoto: Jakub Hałun · CC BY-SA 4.0 · Resized and converted to WebP. Cards crop the display.This photograph shows the site at the time it was taken. Check the notes and official sources for current restoration work and access.

Get to know the castle

Castle at a glance

Site & layout
Mountain castle using the Nishiki River as an outer moat
Origins
Completed 1608; present keep reconstructed 1962
Builders & patrons
Kikkawa Hiroie
Other names
—
What remains today
Original keep platform and walls; modern keep stands elsewhere

THE STORY

The story behind the walls

Kikkawa Hiroie completed the hilltop castle in 1608. It was dismantled in 1615 under the one-castle-per-province policy. Remains including the keep platform survived on the mountain. In 1962 a new keep was built about 50 metres from that platform. It now presents historical displays and views of the castle town.

LAYOUT & ARCHITECTURE

Read the landscape and the buildings.

The castle uses a ridge about 200 metres above sea level and the Nishiki River below as an outer moat. Its keep is known for projecting upper levels, a form described as nanban-zukuri. The current tower and original platform occupy different positions, allowing visitors to distinguish reconstruction from archaeological remains.

A CLOSER LOOK

Details worth a closer look.

01

Hilltop keep

The keep reconstructed in 1962 overlooks the town and Seto Inland Sea. The projecting upper levels are a distinctive feature of its appearance.

02

Original keep platform

The original keep platform survives at a separate location from the current tower. The two sites make the change in position clear.

03

River defences

The Nishiki River below served as a natural outer moat. Looking downhill explains how mountain and river worked together.

THROUGH THE YEARS

A short timeline

  1. 1608

    Kikkawa Hiroie completes the castle.

  2. 1615

    The castle is dismantled under the one-castle policy.

  3. 1962

    A keep is reconstructed at a different position.

BEFORE YOU GO

A note before you go.

Plan your ascent and check the weather before visiting this hilltop castle. See the official site for current admission details.

Information checked: 27 September 2026

Sources & official information

Some official sources are available in Japanese only.