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Part of Saga Castle's Honmaru Palace, rebuilt in wood as the Saga Castle History Museum, November 2017. It recreates, on its original site, the palace Nabeshima Naomasa rebuilt in 1838, using excavations and old plans.
そらみみCC BY-SA 4.0Wikimedia Commons

Saga · Saga

Saga Castle

佐賀城

Saga, Saga

CastleFlatland castle (hirajiro)Japan's 100 Fine Castles No. 89

What makes this castle distinctive

The doors of its gate still carry bullet marks from a civil war fought in 1874.

Why?

Shachinomon Gate at Saga Castle was completed in 1838 as the front gate of the main enclosure and still stands as an original Edo-period building. After the Meiji Restoration the main enclosure housed the prefectural government, and in 1874 it became a battlefield in the Saga Rebellion (also called the Saga War). Bullet marks from that fierce fighting remain on the gate's doors.[13][3]

Three things not to miss

01
Bullet marks on the doors of Shachinomon Gate, May 2010. They are said to date from the Saga Rebellion of 1874.Masahiko SatohCC BY 2.0Wikimedia Commons

Shachinomon Gate and its bullet marks

Where
The north entrance to the main enclosure (honmaru), in front of the Saga Castle History Museum
What to look at
The bronze shachihoko (mythical fish) on both ends of the roof, the turret attached to the gate, and the bullet marks on the doors
Why it's interesting
Completed in 1838 as the front gate of the main enclosure, Shachinomon Gate and its attached turret are an Important Cultural Property. The Agency for Cultural Affairs notes that although it is relatively late, the way the turret projects forward from the gate gives it exceptional design and structural value. Bullet marks from the 1874 Saga Rebellion remain on its doors, a reminder that the castle saw fighting even after the samurai era ended.[3][13][14]
Can you see it?
Visible from outsideYou can walk through the gate and see the doors up close. Whether the turret interior is open is not confirmed.
02
Part of Saga Castle's Honmaru Palace, rebuilt in wood as the Saga Castle History Museum, November 2017. It recreates, on its original site, the palace Nabeshima Naomasa rebuilt in 1838, using excavations and old plans.そらみみCC BY-SA 4.0Wikimedia Commons

The Honmaru Palace, rebuilt in wood

Where
Inside the main enclosure: the Saga Prefectural Saga Castle History Museum
What to look at
The long tatami corridors and halls, and the old pillars and roof tiles of the Gozanoma, the lord's living room
Why it's interesting
Part of the Honmaru Palace that Nabeshima Naomasa rebuilt in 1838 has been reconstructed in wood on its original site, based on excavations and the palace plans of the time. To protect the remains below, the building sits on a layer of sand and a thick concrete slab rather than on piles. The Gozanoma uses original materials from the 1830s, and you can tell old from new by the color. The museum notes that excavations of a castle's main palace are rare in Japan.[2][3][5]
Can you see it?
Visible from outsideFree entry (donations requested). Shoes off inside.
03
The stone base of the keep seen from the northwest, March 2017. The keep burned in the great fire of 1726 and was never rebuilt.PekachuCC BY-SA 4.0Wikimedia Commons

The keep base and the 70-meter-wide moat

Where
The keep base at the northwest of the main enclosure, and the moat around the castle
What to look at
The stone keep base, the tortoise-shell masonry of the southwest turret base, and the broad moat with its tree-covered banks
Why it's interesting
The keep burned in the great fire of 1726 and was never rebuilt, but its stone base survives from the Edo period. The moat is 40 ken (about 70 m) wide, protecting a castle on flat ground with a broad band of water. The southwest turret base uses kikko-ranzumi, stones cut to fit on every face in a tortoise-shell pattern, the only example in the castle.[3][2][1]
Can you see it?
Visible from outsideThe grounds can be walked freely.

At a glance for visitors

Nearest station
25 min walk from JR Saga Station, South Exit
Climb
No climb
Time neededEditors' estimate
About 30 minutes inside the museum (the museum's own estimate). Allow about 1.5 hours if you also walk around Shachinomon Gate, the keep base and the grounds.
Admission
Free (donations requested)
Hours
9:30–18:00
Access
Open to visitors

The grounds (Saga Castle Park) are free to walk around. The Saga Castle History Museum is also free (donations requested); the floors are tatami, so shoes come off at the entrance.

Checked:

View on mapOpen in Google MapsSaga Castle History Museum (official site)

The story of this castle

01
Historical record

Built by enlarging the Ryuzoji family's castle

Saga Castle grew out of Muranaka Castle, the seat of the Ryuzoji family who ruled the area in the Warring States period. It is a flatland castle (hirajiro) surrounded by broad moats, and was nicknamed the "sunken castle," partly because it seemed to sink out of sight behind the trees along its moats.[1][13][17]

02
Historical record

Completed by the Nabeshima family

A major construction project from 1608 to 1611 completed the castle, and Nabeshima Katsushige moved into the main enclosure in 1611. From then until the end of the shogunate, Saga Castle was the seat of the Nabeshima family and the center of the Saga domain (han), assessed at 357,000 koku of rice.[1][13][14]

03
Historical record

Two great fires and a rebuilt main enclosure

In the great fire of 1726, the keep and the buildings of all three main enclosures burned. The keep and honmaru were not rebuilt, and the domain was run from the second enclosure instead. When that also burned in 1835, the 10th lord, Nabeshima Naomasa, decided to rebuild the main enclosure, and the Honmaru Palace was finished in 1838, along with Shachinomon Gate. From this castle Naomasa pushed through domain reforms and rapid modernization, including casting iron cannon in reverberatory furnaces.[1][12][13]

04
Historical record

After the Saga Rebellion, a site for schools and offices

In the Meiji era the palace buildings served as the domain office and then as the prefectural office. Some buildings were damaged in the Saga Rebellion of 1874, but the main enclosure escaped burning. Schools and a weather station later occupied the site, and in 1958 the Gozanoma was moved out of the castle. Through all this, Shachinomon Gate and its turret survived in their Edo-period form and were named an Important Cultural Property in 1957.[1][13]

05
Historical record

The palace rebuilt where excavations found it

Excavations from the 1990s found the palace's foundation stones almost exactly matching the 1830s plans. Based on these, part of the palace was rebuilt in wood and opened in 2004 as the Saga Prefectural Saga Castle History Museum, and the Gozanoma that had been moved away was returned to its original place. Saga Castle ruins became a prefectural historic site in 2001. Excavation of the palace's private inner quarters (oku) is still under way.[1][2][10][17]

People of this castle

Timeline

  1. The castle is completed and Nabeshima Katsushige moves into the main enclosure[1]

  2. A great fire destroys the keep and the main enclosure[1][13]

  3. Nabeshima Naomasa completes the rebuilt Honmaru Palace and Shachinomon Gate[1][13]

  4. The Saga Rebellion; bullet marks are left on Shachinomon's doors[1][13]

  5. Shachinomon Gate and its turret become an Important Cultural Property[1][14]

  6. The Saga Castle History Museum opens in the rebuilt palace[1]

Buildings and remains

The keep today

Keep lost

The keep burned in 1726 and was never rebuilt; only its stone base remains.

The site today

The site is now Saga Castle Park. The main enclosure holds the wooden reconstruction of the Honmaru Palace (Saga Castle History Museum), Shachinomon Gate and the keep base, while the former second and third enclosures are occupied by the prefectural office, museums and schools.

Main buildings

OriginalImportant Cultural Property

Shachinomon Gate and attached turret

The front gate of the main enclosure, completed in 1838. Bullet marks from the Saga Rebellion remain on the doors.[13][14]

Rebuilt in wood

Honmaru Palace (part)

Rebuilt in wood on its original site to its 1830s form, based on excavations and plans. Open as the Saga Castle History Museum.[2]

OriginalSaga City Important Cultural Property

Former Gozanoma and Kanninjo of the Honmaru Palace

Including the lord's living room. Moved out of the castle in 1958 and returned to its original position when the museum was built; original 1830s materials survive.[1][3][17]

Lost

Keep (tenshu)

Burned in 1726; the stone base remains.[1][3]

Key facts

Type
Castle
Setting
Flatland castle (hirajiro)built on flat ground, defended by moatsEditorial 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
Nabeshima Naomasa, Nabeshima Naoshige, Nabeshima Yoshishige, Ryūzōji clanJapan Castle Foundation
Built
1608Japan Castle Foundation
Main lords
Ryūzōji clan, Nabeshima clanJapan Castle Foundation
Abandoned
1871Wikipedia (ja)
Remains to see
Turrets or turret bases, Gates, Stone walls, Moats, Earthen ramparts, Baileys / enclosures (kuruwa), Keep base (tenshudai)Editorial article
Designation
Important Cultural Property (Shachinomon Gate and turret) (1957); Saga Prefectural Historic Site (Saga Castle ruins) (2001); Saga City Important Cultural Property (Gozanoma and Kanninjo) (2001)Editorial article
Selection
Japan's 100 Fine Castles No. 89Japan Castle Foundation

Visiting

Access

Open to visitors

The grounds (Saga Castle Park) are free to walk around. The Saga Castle History Museum is also free (donations requested); the floors are tatami, so shoes come off at the entrance.

Address

2-18-1 Jonai, Saga, Saga 840-0041 (Saga Castle History Museum)[6][16]

Checked: 2026-10-03

Nearest stations and how to get there

JR Saga Station, South ExitJR Nagasaki Main Line, Karatsu Line

about 25 min walk · No climb

Head straight from the South Exit toward the prefectural office and turn left at the Sagajo Honmaru Iriguchi traffic light. About 10 minutes by taxi. City buses from Saga Station Bus Center stop at Hakubutsukan-mae or Sagajo-ato.[6]

Checked: 2026-10-03

Hours and admission

Saga Prefectural Saga Castle History Museum
Hours
9:30–18:00
Closed
December 29 – January 1 (plus occasional closures)
Admission
Free (donations requested)[5][16][4]
Checked: 2026-10-03

By car / parking

Free parking in lots P1–P4 (109 cars in total, 7 buses, 6 accessible spaces). Hours differ by lot; P1 is open 7:30–21:00. Accessible by car from the Saga-Yamato IC.[7][6]

Checked: 2026-10-03
Grounds opening hours
Not confirmedChecked: 2026-10-03
Time neededEditors' estimate
About 30 minutes inside the museum (the museum's own estimate). Allow about 1.5 hours if you also walk around Shachinomon Gate, the keep base and the grounds.
Steps, slopes and footing
A flatland castle; the grounds are almost entirely level.[15]
Wheelchairs and strollers
The museum is barrier-free; you can use your own wheelchair inside by entering via the ramp entrance. Accessible parking is available. There are two accessible toilets inside (one ostomate-friendly) and one at the parking lot. Wheelchairs, walkers and strollers can be borrowed, and there is a nursing room.[8]Checked: 2026-10-03
Toilets and rest
Toilets inside the museum and at the parking lot[8]
English signs / audio guide
The official website has a language menu, but English signage or guides inside the museum are not confirmed.[16]
Seasons
Not confirmed
Photography
Souvenir photos are allowed inside the museum, but please do not take close-ups of exhibits.[9]
Works, closures and restrictions
Excavation of the palace's inner quarters (oku) is under way and the dig is open for viewing, according to the museum's notices.[10][16]Checked: 2026-10-03

Around the castle

Museum

Saga Prefectural Museum and Art Museum

Prefectural museum and art museum next to the History Museum, covering Saga's history, nature and art. Open 9:30–18:00; closed Mondays (or the next day after a holiday). Free (some special exhibitions charge).[11]

Checked: 2026-10-03

Museum

Chokokan

Displays art and historical materials handed down in the Nabeshima family, the lords of Saga. Open 9:30–16:00; closed Sundays, holidays and between exhibitions. Admission 300 yen.[11]

Checked: 2026-10-03

Editors' guide

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

Who will enjoy it

Good for anyone who wants to walk through a castle palace, and for those interested in Saga's rapid modernization in the late Edo period or the Saga Rebellion of 1874. Free entry and walkable from the station make it an easy stop even on a short visit.

What makes it interesting

Start with the bullet marks on Shachinomon's doors, then walk the long tatami corridors and the Gozanoma inside the museum. Finish on the keep base, where you can see how this castle on flat ground relied on its wide moats.

Before you go

There has been no keep since it burned in 1726. The palace is a 2004 wooden reconstruction, with some original materials in parts such as the Gozanoma. You walk inside in your socks.

Ways to enjoy it

Volunteer guides explain Saga Castle and local history at the museum (groups should apply three days ahead). In the Tamari-no-ma room you can choose from videos on the palace reconstruction and the Mietsu Naval Dock, a World Heritage site.

Photos

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Open questions

Sources

  1. 1
    佐賀城の歴史佐賀県立佐賀城本丸歴史館officialChecked:
  2. 2
    佐賀城本丸御殿の復元佐賀県立佐賀城本丸歴史館officialChecked:
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    全景図佐賀県立佐賀城本丸歴史館officialChecked:
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    当館おすすめコース佐賀県立佐賀城本丸歴史館officialChecked:
  5. 5
    利用案内佐賀県立佐賀城本丸歴史館officialChecked:
  6. 6
    交通アクセス佐賀県立佐賀城本丸歴史館officialChecked:
  7. 7
    駐車場のご案内佐賀県立佐賀城本丸歴史館officialChecked:
  8. 8
    バリアフリー情報佐賀県立佐賀城本丸歴史館officialChecked:
  9. 9
    御利用時のお願い佐賀県立佐賀城本丸歴史館officialChecked:
  10. 10
    発掘調査報告(佐賀城本丸御殿跡調査研究事業)佐賀県立佐賀城本丸歴史館officialChecked:
  11. 11
    周辺施設案内佐賀県立佐賀城本丸歴史館officialChecked:
  12. 12
    佐賀の群像佐賀県立佐賀城本丸歴史館officialChecked:
  13. 13
    国指定重要文化財(佐賀城鯱の門および続櫓)佐賀市municipalChecked:
  14. 14
    佐賀城鯱の門及び続櫓(国指定文化財等データベース)文化庁heritageChecked:
  15. 15
    日本100名城 一覧公益財団法人日本城郭協会jokakuChecked:
  16. 16
    佐賀県立佐賀城本丸歴史館 トップページ佐賀県立佐賀城本丸歴史館officialChecked:
  17. 17
    佐賀城(補助資料)Wikipedia日本語版otherChecked:
  18. 18
    List of Japan's 100 Fine Castles and the Next 100公益財団法人日本城郭協会jokakuChecked:
  19. 19
    Wikipedia「佐賀城」Wikipedia日本語版wikipediaChecked:
  20. 20
    Wikidata Q1071095WikidatawikidataChecked:
  21. 21
    OpenStreetMap node/12902924455© 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

Saga Castle Park0.2 km · Not yet confirmedTakagi Castle4.1 km · Not yet confirmedHasuike Castle5.3 km · Not yet confirmedHizen Takada Castle6.2 km · Not yet confirmedAnegawa Castle6.9 km · Not yet confirmedNaotori Castle7 km · Not yet confirmed

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