十Christian Japan
Place guide · Shimabara & Amakusa · Castle ruins

Hara Castle Ruins

World Heritage component

On a headland at the tip of the Shimabara peninsula, archaeologists found small crosses made from lead bullets. Who made them, and why was this castle torn apart stone by stone?

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Hara is where open Christianity in Japan ended. The rising of 1637 and its slaughter pushed the shogunate to close the country, and from then on the Christians who were left had to keep their faith in hiding.

The grassy headland of Hara Castle seen from the sea
The grassy headland of Hara Castle seen from the sea.Remains of Hara Castle seen from the sea, December 2004. Chris 73, CC BY-SA 3.0. Commons

In 60 seconds

The place in 8 steps. Each line is footnoted.

  1. 1598 to 1604The Christian daimyo Arima Harunobu builds Hara Castle.
  2. 1618The new lord, Matsukura, builds his own castle and Hara is abandoned.
  3. 1637Over 20,000 people rise against harsh rule and famine and hold the old castle.
  4. 1638After four months the shogunate's army of over 120,000 kills almost all of them.
  5. After 1638Portuguese ships are banned and the long closure of the country begins.
  6. 17 Dec 1637Cruel taxes and the torture of a farmer's daughter spark the rising, says the Catholic historian Pagès.
  7. 1938The site becomes a national historic site.
  8. 2018It is listed as part of the World Heritage property.

Crosses from bullets

Among the bones in the castle's broken stone walls, the excavators found small crosses. They had been made inside the castle, quickly, from the lead of gun bullets. With them were medals that had been handed down in families since the first missionaries gave them out.

The people who made them were besieged. In 1637, after years of harsh rule and famine, peasants of the southern Shimabara peninsula and the Amakusa islands rose up, and, it is said, more than 20,000 of them shut themselves into the abandoned castle at Hara under a young leader, . They took with them the banner of a Christian confraternity and used it as their battle flag, and they prayed in Latin written out in Japanese script. Shogunate records suggest they built a chapel inside the walls and preached there. Among the finds are flower-cross roof tiles of the kind dug up at Nagasaki's church sites, and , medals bearing the figures of St Ignatius Loyola and St Francis Xavier; their war cry, the Dutch recorded, was "Santiago!" The city's excavation report says the crosses, medals and rosary beads show plainly the faith of the Christians who held the castle.

Sources: crosses from bullets

The castle's building dates come from Jesuit reports sent to Europe. The siege comes from shogunate records and from excavations that are still going on, which have found the bones, the devotional objects and the houses of the defenders. The banner and the prayer survive because samurai of the shogunate's army took them home as trophies.

On the mapThe rising of 1637
Hara Castle ruins, Shimabara Castle, Amakusa. Full atlas and pin sources
1598 to 1618

The Arima castle

The castle was built between 1598 and 1604 by , a Christian daimyo, and the Jesuits reported its building to Europe. It stands on a hill that juts into the sea, with water on the north, east and south and low marsh to the west, and was laid out in a main enclosure, second and third enclosures, an Amakusa enclosure and outworks. Its early stone walls show the techniques in fashion under Oda and Toyotomi.

The Arima left the region, and the family who replaced them built a new castle. In 1618 Hara was given up.

On the mapThe Arima lands
Hara Castle ruins, Arima Kirishitan Heritage Museum, Arima seminary site. Full atlas and pin sources
1637 to 1638

The rising

The shogunate sent an army of more than 120,000 against the castle. The defenders fought back hard, and the attackers suffered more than 8,000 dead and wounded. After a siege of four months almost everyone inside, men and women, young and old, was killed. the official component page gives "about 20,000 and several thousand" defenders; a column on the prefecture's site puts the dead at about 26,000.

The Catholic historian Léon Pagès, writing from the account of Duarte Correa, a Portuguese captain then held for the faith in the jail at Ōmura, insisted that religion was not the true cause. The lord had added tax upon tax: half of every tobacco plant's leaves, a share of every eggplant, a levy on every house. Farmers who could not pay were beaten, and their wives taken as hostages; some pregnant women were plunged into icy water and died. When the daughter of a leading farmer was stripped and burned with brands, her father and his friends killed the local official and his men, on 17 December 1637, and the whole district rose. In Japanese the rising is called an . Correa himself was burned at a slow fire at Ōmura in 1639.

Former retainers of the Christian daimyo Arima Harunobu and took the lead. They are said to have been the leaders of the , the units of the Christian community. West of the main enclosure, excavation has found rows of half-underground huts, built regularly, which show that the defenders still acted together as families and villages.

After 1638

A castle destroyed

The castle fell on the 28th day of the second month of Kan'ei 15, which is 12 April 1638. The very next day Hosokawa Tadatoshi ordered parties of good walkers with guns into the hills to hunt down the Christians who had escaped, and told his elders to have 500 men ready, for the stone walls of the main enclosure were to be pulled down from the following day. Pagès found no living soul left in the fort; he counts 35,000 dead, "others have said 37,000". Pagès dates the end of the siege 15 April 1638, three days after the Japanese date; we use 12 April. To break the walls the shogunate's commander had even called on a Dutch ship, the De Ryp, which fired on the castle from the sea between 21 February and 12 March 1638. Hosokawa Tadatoshi protested that asking foreigners for help was a disgrace to Japan.

The bones, crosses and huts were found buried inside the broken stone walls. The shogunate, afraid that the castle could be used for another rising, had destroyed it completely.

The rising shocked the shogunate. It banned the Portuguese ships that might carry missionaries in, and the country was closed for more than two centuries. With no priests left in Japan, the Christians who survived had to go into hiding and keep the faith by themselves. The memory of the rising was handed down for generations in hidden Christian villages, in and in among them.

Timeline

The dated story

Every dated event on this page, with its sources. Filter by section.

  1. 1598 to 1604Arima Harunobu builds the castle
  2. 1618Castle abandoned after Matsukura builds a new one
  3. 1637Shimabara and Amakusa rising; Hara occupied
  4. 17 Dec 1637Rising begins, by Pagès' account
  5. 21 Feb to 12 Mar 1638Dutch ship De Ryp fires on the castle
  6. 1638Rising crushed after a four-month siege
  7. 12 Apr 1638Fall of the castle, Kan'ei 15.2.28 (Pagès gives 15 Apr)
  8. 13 Apr 1638Hosokawa orders the hunt for survivors and men for pulling down the walls
  9. 1638 onwardPortuguese ships banned; closure of the country
  10. 1938National historic site (30 May)
  11. 1992Excavations begin
  12. 2018World Heritage component
Atlas

Where it happened

Each pin is a place named on this page. Coordinates come from official prefecture maps, OpenStreetMap or Wikidata, as listed. Rows marked "not yet pinned" have no verified pin.

This placeRelated site
PlaceWhy it matters hereCoordinatesCoordinate source
Hara Castle ruinsThe castle and battlefield of 1637 to 163832.6291528, 130.2547149OpenStreetMap node/6125943993
Arima Kirishitan Heritage MuseumFinds from Hara and Hinoe32.6360904, 130.2435461OpenStreetMap way/632003561
Arima seminary siteThe Jesuit school of the Arima domain32.6569254, 130.2495394OpenStreetMap node/10701910369
Shimabara CastleThe Matsukura castle32.7892195, 130.3672597OpenStreetMap way/477197128
AmakusaHome of many of the rebels32.4585127, 130.1930487OpenStreetMap relation/3998266, town level
Hinoe Castle ruinsThe older Arima castlelocation not pinnednot yet pinned
Name cards

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Glossary

Words on this page

kumi 組
A unit of the Christian community, led by a lay leader.
medai メダイ
A devotional medal of Mary or the saints.
ikki 一揆
A rising of peasants or townspeople against their rulers.
Sources

Footnotes

Translations from Japanese sources are ours.

  1. Nagasaki Prefecture, World Heritage Division, "原城跡" (component 1 of the Hidden Christian Sites), source link (checked 19 Oct 2026)
  2. Nagasaki Prefecture, おらしょ こころ旅, "原城跡" (asset page, column titles, glossary, access), source link
  3. UNESCO World Heritage Centre, "Hidden Christian Sites in the Nagasaki Region" (1495), source link
  4. Nagasaki Prefecture, おらしょ こころ旅, "南島原市有馬キリシタン遺産記念館" (address, hours, fees), source link
  5. Minamishimabara City, 史跡原城跡保存活用計画, 第3章 "史跡原城跡の概要および現状と課題" (designation 30 May 1938, excavations from 1992, finds), source link
  6. Léon Pagès, *Histoire de la religion chrétienne au Japon depuis 1598 jusqu'à 1651* (Paris: Douniol, 1869), pp. 842 to 848, source link
  7. Hattori Hideo, "海の城、原城: 原城の戦いを考え直す," in *歴史を読み解く* (Seishi Shuppan, 2003), pp. 178 to 197, source link
  8. Kumamoto University Library, 細川忠利達書写 (Matsui family papers, 松井家文書 11-96-1), dated [Kan'ei 15] 2.29, described as an order to the Hosokawa elders "the day after the fall of Hara Castle", source link (checked 20 Oct 2026)
  9. National Astronomical Observatory of Japan, 日本の暦日データベース, 寛永15年2月28日 = 1638/04/12 (Gregorian), source link (checked 20 Oct 2026)
The wider story

For the wider story around this place, see The Arima seminary.

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