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Stone walls and a park path among autumn leaves (November 2017). All of Morioka Castle's walls are built of granite quarried in and around the castle.
663highlandCC BY-SA 4.0Wikimedia Commons

Iwate · Morioka

Morioka Castle

盛岡城

Morioka, Iwate

CastleHilltop castle (hirayamajiro)Japan's 100 Fine Castles No. 6

What makes this castle distinctive

Almost no buildings survive, yet the stone walls alone tell 90 years of castle building, from rough natural stones laid around 1600 to neatly squared blocks dated 1686, all within one castle.

Why?

All of Morioka Castle's walls are built of granite quarried in and around the castle, and the stacking style changes with the period. The east side of the main enclosure keeps the original rough natural-stone walls, the waist enclosure has split stones still showing wedge holes, and the west side of the second enclosure has tall walls of squared blocks bearing an inscription dated 1686. The city calls them the most beautiful stone walls in the Tohoku region.[1][3][2]

Three things not to miss

01
Stone walls and a park path among autumn leaves (November 2017). All of Morioka Castle's walls are built of granite quarried in and around the castle.663highlandCC BY-SA 4.0Wikimedia Commons

Stone walls that change with the centuries

Where
The east side of the main enclosure (rough natural stone), the waist enclosure (random-laid split stone), the west side of the second enclosure (coursed squared stone), and the north side of the third enclosure.
What to look at
Sections of natural boulders, split stones still showing the holes where wedges were driven (yaana), and sections of squared blocks laid in level rows with gracefully curving corners.
Why it's interesting
The rough walls on the east side of the main enclosure are thought to be the oldest, from the Keicho era (1596–1614). The waist enclosure dates from about 1615 to the 1620s, the west wall of the second enclosure was built in 1686 after the Kitakami River was diverted, and the north wall of the third enclosure bears a date of 1705. Comparing the "ages" of the walls as you walk is the joy of this castle.[1][3]
Can you see it?
Visible from outsideFreely visible from inside the park; some sections may be under repair.
02

Tounkyo Bridge (site of the covered bridge) and the old walls beneath

Where
Between the main and second enclosures, where Tounkyo Bridge now spans the site of the old covered corridor bridge.
What to look at
The high walls of the main and second enclosures seen from the bridge, and the older stonework visible below it.
Why it's interesting
In the Edo period the main and second enclosures were linked by a roofed corridor bridge. Today's Tounkyo Bridge stands on its site, and the city names the area beneath it as one of the places where you can see early stonework from near the castle's founding.[1][3]
Can you see it?
Visible from outsideFreely visible in the park.
03
Tsurugaike pond (April 2024), a remnant of the castle's inner moat, fed by water from the Nakatsu River.石巻敎祖CC BY 4.0Wikimedia Commons

Tsurugaike and Kamegaike, remnants of the inner moat

Where
On the north side of the park, on either side of the Sakurayama Shrine gateway: Tsurugaike to the east, Kamegaike to the west.
What to look at
The ponds fed by water from the Nakatsu River, the wisteria trellis at Tsurugaike in May, and the hydrangeas around the ponds in July.
Why it's interesting
The two ponds are what remains of the castle's inner moat. Unlike the stone-heavy main enclosure, they preserve the look of a water-filled moat.[1]
Can you see it?
Visible from outsideFreely visible in the park.

At a glance for visitors

Nearest station
20 min walk from JR Morioka Station (East Exit)
Climb
Not confirmed
Time neededEditors' estimate
About an hour to tour the walls in the park; allow 2 hours with the History and Culture Museum.
Admission
Adults 450 yen, high school students 300 yen, elementary and junior high 150 yen; groups of 20+ 360/240/120 yen
Hours
April–October 9:00–19:00 (last entry 18:30); November–March 9:00–18:00 (last entry 17:30)
Access
Open to visitors

Morioka Castle Ruins Park is free to walk. There are no castle buildings to enter; the castle's history is displayed at the neighboring Morioka History and Culture Museum (paid).

Checked:

View on mapOpen in Google MapsMorioka Castle Ruins Park (Morioka City, Japanese)Morioka Castle site (Morioka City, Japanese)Morioka History and Culture Museum (Japanese)

The story of this castle

01
Historical record

A hill where two rivers meet

The Nanbu clan had its roots in Nukanobu, around today's Sannohe and Hachinohe in Aomori. In 1590 Nanbu Nobunao was confirmed by Toyotomi Hideyoshi as lord of seven districts, and in 1591, on the advice of Hideyoshi's senior retainer Asano Nagamasa, he decided to move his seat from Sannohe to Kozukata. The chosen site was a hill jutting into the meeting point of the Kitakami and Nakatsu rivers, where his retainers the Fukushi clan had a castle called Kozukata.[2][1]

02
Tradition

Thirty-six years in the making

In 1597 Nobunao is said to have broken ground with his heir Toshinao as chief overseer, and full construction began after formal approval in 1598. Work continued despite repeated floods from the Kitakami and Nakatsu rivers, and when the castle was largely finished in 1633, the third lord, Shigenao, moved in. It remained the Nanbu family's seat until the Meiji era.[1][2]

03
Historical record

Stone-walled core, moated town

On the hilltop, the main, second and third enclosures and the Awajimaru were ringed with massive stone walls to form the inner castle. To the north, the ground was leveled and enclosed with moats and earthworks as an outer enclosure for the residences of clan members and senior retainers. Beyond that, moats and earthworks extended across the Nakatsu River to enclose a further ring where samurai and townspeople lived. Bridges over the Nakatsu were built between 1609 and 1612 as the castle town took shape.[1][2]

04
Historical record

From earth to stone

Dismantling and excavating the walls has revealed how the castle evolved. The Warring States-era Kozukata Castle was an "earth castle" of dry moats and ramparts. In the first Morioka Castle, only parts of the main and second enclosures had stone walls; the rest were earthen banks with wooden fences. In the next phase the waist enclosure was walled in stone and the main enclosure's walls were rebuilt, but soon the three-story turret and other buildings in the main enclosure burned after a lightning strike. Rebuilding began in 1674, tall walls went up on the west side of the second enclosure through 1686, and red roof tiles came into use on the main turrets.[4]

05
Historical record

The buildings went; the walls stayed

In 1868 the Morioka domain surrendered in the Boshin War and the castle passed to the new government. It came under the Army Ministry in 1872, and in 1874 its buildings and trees were sold at auction and removed. The Nanbu family acquired the site in 1890, and in 1906 it opened as Iwate Park, designed by Nagaoka Yasuhei, a pioneer of modern parks in Japan. In 1934 the city bought most of the land from the Nanbu family.[1][2]

06
Historical record

Ongoing wall repairs

The site became a National Historic Site in 1937. Earthquakes, rain and tree roots have damaged the walls over time, so since 1984 the city has been taking apart and rebuilding damaged sections while surveying them: about 5,000 of the roughly 16,000 square meters of walls. In 2006, the park's centenary, it was given the nickname Morioka Castle Ruins Park.[1][2]

People of this castle

Timeline

  1. Nanbu Nobunao is said to begin the castle, with Toshinao as chief overseer[1][2]

  2. Largely complete; third lord Nanbu Shigenao moves in[1]

  3. The tall west wall of the second enclosure is completed (dated inscription)[3][4]

  4. Castle buildings are sold off and demolished[1][2]

  5. Opens as Iwate Park[1][2]

  6. Designated a National Historic Site[2][5]

  7. Repairs to the stone walls and excavations begin[1][2]

Buildings and remains

The keep today

Keep lost

The main enclosure had a three-story turret, but nearly all buildings were demolished in the Meiji era. The Japan Castle Foundation describes the site as having only the keep's stone base left.

The site today

Open as Morioka Castle Ruins Park (Iwate Park) in the middle of the city. Almost no castle buildings remain, but the stone walls and parts of the moat (the Tsurugaike and Kamegaike ponds) survive. The Morioka History and Culture Museum stands next to the park.

Main buildings

Lost

Three-story turret and other main-enclosure buildings

Burned by lightning in the early Edo period and rebuilt from 1674; demolished with the other castle buildings in 1874.[4][1]

Original

Stone walls

About 16,000 m2 in total, showing styles from around 1600 to about 1705. Damaged sections have been under repair since 1984.[1][3]

Key facts

Type
Castle
Setting
Hilltop castle (hirayamajiro)built on a low hill rising from the plainEditorial article
Period
Early modern (1570s–1871)Editorial article
Keep (tenshu)
Keep lostthe castle had a keep, but it no longer stands (its stone base may remain)Editorial article
Built by
Nanbu NobunaoJapan Castle Foundation
Built
1598Japan Castle Foundation
Main lords
Nanbu clanJapan Castle Foundation
Abandoned
1871Wikipedia (ja)
Remains to see
Stone walls, Earthen ramparts, Moats, Gates, Baileys / enclosures (kuruwa), Keep base (tenshudai)Editorial article
Designation
National Historic Site (Morioka Castle site) (1937)Editorial article
Selection
Japan's 100 Fine Castles No. 6Japan Castle Foundation

Visiting

Access

Open to visitors

Morioka Castle Ruins Park is free to walk. There are no castle buildings to enter; the castle's history is displayed at the neighboring Morioka History and Culture Museum (paid).

Address

1-37 Uchimaru, Morioka, Iwate (Morioka Castle Ruins Park)[1]

Checked: 2026-10-03

Nearest stations and how to get there

JR Morioka Station (East Exit)Tohoku and Akita Shinkansen, JR Tohoku Line and others

about 20 min walk · Not confirmed

About 20 minutes on foot to the Morioka History and Culture Museum via Kaiun Bridge and Odori street. By bus, take the Denden-mushi downtown loop (counterclockwise) or a bus bound for Morioka Bus Center, about 10 minutes, to Kencho-Shiyakusho-mae, then walk about 4 minutes.[7]

Checked: 2026-10-03

Hours and admission

Morioka History and Culture Museum
Hours
April–October 9:00–19:00 (last entry 18:30); November–March 9:00–18:00 (last entry 17:30)
Closed
Third Tuesday of each month (next day if a holiday), December 31 – January 1
Admission
Adults 450 yen, high school students 300 yen, elementary and junior high 150 yen; groups of 20+ 360/240/120 yen[8][7]
Checked: 2026-10-03

By car / parking

The museum has no general parking; use the paid Morioka Castle Ruins Park underground car park next door or other nearby paid lots.[7]

Checked: 2026-10-03
Grounds opening hours
Not confirmedChecked: 2026-10-03
Time neededEditors' estimate
About an hour to tour the walls in the park; allow 2 hours with the History and Culture Museum.
Steps, slopes and footing
The castle stands on a hill, with the main and second enclosures on top of high walls, so expect some ups and downs.[1]
Wheelchairs and strollers
Not confirmedChecked: 2026-10-03
Toilets and rest
Not confirmed
English signs / audio guide
Not confirmed
Seasons
About 100 plum trees bloom until early April, followed by cherry blossoms. In May the wisteria trellis at Tsurugaike flowers, and in July hydrangeas surround the ponds. In autumn the maples set off the stone walls.[1]
Photography
Photography is generally allowed in the History and Culture Museum (no flash, tripods, selfie sticks or video; some special exhibitions prohibit photos).[8]
Works, closures and restrictions
None found as of October 3, 2026. Stone-wall repairs have been ongoing since 1984, and work may be under way in some areas.[1]Checked: 2026-10-03

Around the castle

Editors' guide

An editorial guide based on sources and confirmed information — not a first-hand visit report.

Who will enjoy it

For stone-wall enthusiasts and anyone who enjoys reading a castle's history from how its walls were built. It is a downtown park within walking distance of the station, easy to visit on a stroll.

What makes it interesting

The highlight is comparing the natural-stone walls on the east side of the main enclosure with the squared-stone walls on the west side of the second enclosure. Look for wedge holes in the waist-enclosure stones too, then finish at Tsurugaike and Kamegaike, the surviving parts of the inner moat.

Before you go

Almost no buildings survive; the attractions are the walls and the lay of the land. To picture the castle as it was, visit the neighboring museum (closed on the third Tuesday of each month).

Ways to enjoy it

See the castle displays at the museum first, then walk the park and imagine which buildings stood where. Plum and cherry blossoms in spring and maple leaves in autumn contrast beautifully with the walls.

Photos

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Open questions

Sources

  1. 1
    盛岡城跡公園(岩手公園)盛岡市municipalChecked:
  2. 2
    盛岡城跡 盛岡城の歴史盛岡市municipalChecked:
  3. 3
    盛岡城跡 石垣の美盛岡市municipalChecked:
  4. 4
    盛岡城跡 城の変遷盛岡市municipalChecked:
  5. 5
    盛岡城跡(文化遺産オンライン)文化庁heritageChecked:
  6. 6
    日本100名城 一覧公益財団法人日本城郭協会jokakuChecked:
  7. 7
    ご利用案内・周辺地図・交通案内もりおか歴史文化館officialChecked:
  8. 8
    ご利用案内(お客様へのお願い・写真撮影)もりおか歴史文化館officialChecked:
  9. 9
    List of Japan's 100 Fine Castles and the Next 100公益財団法人日本城郭協会jokakuChecked:
  10. 10
    Wikipedia「盛岡城」Wikipedia日本語版wikipediaChecked:
  11. 11
    Wikidata Q251650WikidatawikidataChecked:
  12. 12
    OpenStreetMap node/1945044787© OpenStreetMap contributors (ODbL)osmChecked:

Listing status

  1. Candidate foundChecked
  2. Confirmed as a castle siteChecked
  3. Basic informationChecked
  4. In-depth articleChecked
  5. Photo rights checkedChecked
  6. Visit info checkedChecked

Castles nearby

Nakano Castle1.2 km · No keep recordedKuriyagawa Palisade2.8 km · Not yet confirmedKuriyagawa Castle3 km · No keep recordedUbato Palisade3 km · Not yet confirmedShiwa Castle4 km · Not yet confirmedMirumae Castle6.7 km · No keep recorded

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