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Amakusa Shirō (about 1621 to 1638): The Boy under the Eucharistic Banner

Masuda Shirō Tokisada, known as Amakusa Shirō and said to have been baptized Jerónimo, was the teenage figurehead of the Shimabara and Amakusa rising of 1637 to 1638; he died with the defenders of Hara Castle, and the banner of the Blessed Sacrament carried in his name survives.

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In 60 seconds

The opening line of each part of the story.

  1. A boy almost unknownAlmost everything about Amakusa Shirō is uncertain.
  2. Family and schoolingHis father, Masuda Jinbei Yoshitsugu, came from Ōyano in Amakusa and had served the Christian lord Konishi Yukinaga.
  3. Hunger and persecutionIn the mid 1630s, the encyclopedias say, Shimabara and Amakusa were close to famine under heavy taxes and repeated bad harvests.
  4. The figureheadAccording to the encyclopedias, the real organisers of the rising were village headmen and masterless samurai, many of them former retainers of the Arima and Konishi.
  5. HaraFor about three months the defenders, more than twenty thousand men, women and children by Nakamura's reckoning (Pagès gives thirty-five thousand), held out against an army of more than a hundred thousand.
  6. The banner of the Blessed Sa…The most moving relic of the siege is a banner.
  7. MartyrdomIs Amakusa Shirō a martyr?

Story

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A boy almost unknown

Almost everything about Amakusa Shirō is uncertain. The historian Nakamura Tadashi, writing in two Japanese encyclopedias, says that his career and even his exact identity are "almost entirely unknown."He was called by many names. From his father's surname he was Masuda Shirō; from the places he lived, Ebe Shirō or Ōyano Shirō; as leader of the rising, Amakusa Shirō Dayū Tokisada or Ama no Shirō Hidetsuna. His baptismal name is said to have been Jerónimo.The French Catholic historian Léon Pagès, writing in 1869 from the account of the Portuguese captain Duarte Correa, calls him "Jérôme," "a young man of scarcely eighteen," born of noble parents and a native of Higo.

Even his birth year is uncertain. The Digital Daijisen gives 1621; Heibonsha, Yamakawa and the Nihon Kokugo Daijiten give about 1623; the Nipponica gives 1623 or 1624.The Kodansha dictionary and the Daijisen say he was sixteen when he died (; see below).

Family and schooling

His father, Masuda Jinbei Yoshitsugu, came from Ōyano in Amakusa and had served the Christian lord . When Konishi fell after Sekigahara, Jinbei became a masterless samurai and settled as a farmer at Ebe village in Uto district, Higo.Shirō's elder sister was married to the younger brother of the village headman of Ōyano.

Hunger and persecution

In the mid 1630s, the encyclopedias say, Shimabara and Amakusa were close to famine under heavy taxes and repeated bad harvests.Both lands had once been Christian domains, of and of Konishi Yukinaga, and many of the people were still secretly Christian.Nakamura makes a sharp point: because the region had been a great centre of the Church, even ordinary demands for lower taxes were treated as religious resistance, and that charge was then used to justify more repression and more extortion.Pagès lists the burdens: taxes on rice and houses, half the leaves of every tobacco plant, women taken as hostages and tortured.

Ten years earlier, Shimabara had already given the Church true martyrs. In February 1627 the lord Matsukura had sixteen Christians, their fingers cut off, drowned in the Ariake Sea, among them the three sons of Paulo Uchibori Sakuemon, the youngest only five; a week later Paulo himself and fifteen others died at the hot springs of . "Father, let us thank God for so great a grace," the second son, Antonio, is remembered as saying. Paulo and his sons are among the beatified in 2008.The rising of 1637 grew in the same soil, but it took a different path.

The figurehead

According to the encyclopedias, the real organisers of the rising were village headmen and masterless samurai, many of them former retainers of the Arima and Konishi.To bind together a great mass of farmers ready to die, they presented the fifteen- or sixteen-year-old Shirō as a saviour sent from heaven and staged a series of wonders around him.Yamakawa's dictionary says that his brother-in-law Watanabe Kozaemon and others proclaimed him "Deus reborn."From the first days of the rising the Shimabara domain itself saw him as the central figure, but Nakamura thinks it unlikely that he directed the fighting.

The rising broke out in the tenth month of Kan'ei 14, in December 1637, with the killing of a village governor in the Arima district; our Shimabara page gives the details.In Amakusa the rebels attacked the castle of Tomioka before crossing to the Shimabara peninsula.On the third day of the twelfth month of Kan'ei 14, which by the national observatory's calendar was 17 January 1638, Shirō is said to have entered the abandoned castle of Hara.

Hara

For about three months the defenders, more than twenty thousand men, women and children by Nakamura's reckoning (Pagès gives thirty-five thousand), held out against an army of more than a hundred thousand.Nakamura writes that throughout the siege, the faith seen in "Shirō's banner" held them together, and he concludes that "his extraordinary qualities as a leader cannot be denied."Heibonsha calls him the symbol of their unity, who never showed his face.

Our Shimabara page tells the siege: flags with red crosses on the parapet, and a letter tied to an arrow saying that the defenders had not risen for land but because "the Christian sect is not tolerated," and that those who would not change their religion were "tortured to death" for "their devotion to the Lord of Heaven."Pagès describes the end. With the powder gone, the defenders fought with their rice pots; the third ditch filled with the dead and wounded, who fell alive onto the bodies below and suffocated.The final assault came on the 27th and 28th of the second month of Kan'ei 15, 11 and 12 April 1638, and the defenders were killed to the last.The Kodansha dictionary puts Shirō's death on the 28th, at sixteen.

Among the heads, one taken by a samurai of the Kumamoto domain, Jinno Saemon, was judged to be Shirō's. It was sent to Nagasaki and exposed there, with those of his mother and others.Pagès writes that the head of "Machoudano Chicô" was searched for a long time before it was found and carried to Nagasaki.His father, Jinbei, died when the castle fell.

The banner of the Blessed Sacrament

The most moving relic of the siege is a banner. Its official name is "Standard with a painting of the Eucharist on figured silk," but it is known as the "battle flag of Amakusa Shirō."It is a square of white Chinese silk damask, 108.6 centimetres each way, woven with a chrysanthemum pattern. In the centre is a great chalice, above it the Host marked with a cross, and on either side an angel with hands joined in adoration.Across the top runs a Portuguese inscription, which Amakusa Television renders in Japanese as "May the most holy Sacrament be praised."Bloodstains and the marks of arrows and bullets remain on it.

Who painted it is not known. Tradition names Yamada Emonsaku, a painter in the Western manner who was inside the castle, or says it was painted as a church banner at a seminary before the ban; Amakusa Television adds that there is no proof ().The city says that it was carried away from Hara as a trophy by the Nabeshima troops of Saga, and that it came down in a samurai family.In 1964 it was designated an Important Cultural Property, and it is now kept at the Amakusa Christian Museum in Amakusa city, which shows the original only four weeks a year and a replica otherwise.Each year the museum has held a memorial for the banner on its opening day, 1 August, at which, Amakusa Television reported, the priest of the Catholic church of Hondo prayed with the faithful for the souls of Shirō and the victims of the rising.

The banner says what the rebels said in their arrow letter: what they held most dear was the faith they had been forbidden. Of the holy images of the century, almost none escaped the persecution; this one survived, the television report observes, by the irony of having been taken as spoil.

The question of martyrdom

Is Amakusa Shirō a martyr? The Catholic Church has not declared him one, and the Jesuit historian Kawamura Shinzō, asked this in 2016, explained why, answering a parishioner's question after a talk at a Tokyo parish. A martyr, he said, must fulfil three conditions: to die, to die because of faith in Christ, and to die without resisting. Shirō "resisted with weapons," and so does not count as a martyr. Kawamura added that some historians even doubt whether Shirō was the real leader at all, since the rising is said to have been raised by the former Arima and Konishi retainers, who may simply have borrowed his name.

That judgment does not make the people of Hara any less Christian, nor their deaths less tragic. After the rising, memorial stones were raised for the dead: the city's survey of the castle lists one erected in 1648 by Suzuki Shigenari, and the "Honekami Jizō" of 1766.Excavations at Hara since 1992 have brought up crosses, medals and rosary beads from the soil, which the city calls direct evidence of the faith of those who held the castle.After Hara, the Nihon Kokugo Daijiten notes, the ban on Christianity grew stricter still, and the faith in the region survived only in hiding.A boy of perhaps sixteen died there with the defenders, under a banner adoring the Blessed Sacrament.

What is uncertain

Where the sources disagree
  • Wonders and the bird. Tradition, from the account translated by Murdoch.
Timeline

The dated story

Every dated row in this story, with its source.

  1. About 1621 to 1624Born
  2. 1627Shimabara martyrs (Paulo Uchibori and companions)
  3. Dec 1637Rising begins in Arima; Amakusa rises
  4. 17 Jan 1638 (Kan'ei 14.12.3)Shirō said to enter Hara
  5. 11 to 12 Apr 1638Final assault; Shirō dies
  6. 1648Suzuki Shigenari memorial stone at Hara
  7. 11 Jan 1964Banner designated Important Cultural Property
  8. 1992 onwardExcavations at Hara
Atlas

Every place in this story

Every place in this story. Each pin is marked as an exact site, town level or approximate. Rows without coordinates are listed as not pinned.

Exact siteApproximate or town level
PlaceWhy it matters hereCoordinatesCoordinate source
haraHara Castle ruins.32.62915, 130.25471Exact site OpenStreetMap node/6125943993 (原城跡 marker)
Amakusa christian museumamakusa-christian-museum (new row): 32.460117, 130.184219, GSI address search for Funanoo-machi 19-52, Amakusa city (address per the city page).32.46012, 130.18422Approximate 32.460117, 130.184219, GSI address search for Funanoo-machi 19-52, Amakusa city (address per the city page).
Ebe village, Utonot pinned.not pinnedUnverified
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Full record

Key facts

FactValueStatusSource
NamesMasuda Shirō Tokisada; Amakusa Shirō; Ebe Shirō; Ōyano Shirō; Ama no Shirō HidetsunaSolid
Baptismal nameJerónimo ("said to be")Unverified
Born1621 (Daijisen); about 1623 (Heibonsha, Yamakawa); 1623 or 1624 (Nipponica)Disputed
FatherMasuda Jinbei Yoshitsugu, former Konishi retainer, of Ebe, Uto districtSolid
Enters HaraKan'ei 14.12.3 = 17 Jan 1638 (NAOJ) ("it is said")Solid (date as reported)
DiedKan'ei 15.2.28 = 12 Apr 1638, Hara CastleSolid
Age at death16 (Kodansha, Daijisen); "scarcely eighteen" at the rising (Pagès)Disputed
BannerEucharistic banner, Important Cultural Property (11 Jan 1964), Amakusa Christian MuseumSolid
Status in the ChurchNot beatified; not a martyr (armed resistance)Solid
Glossary

Words in this story

Kirishitan 吉利支丹 / キリシタン
From the Portuguese Christão. The historical Japanese term, from Xavier’s time on, for Catholic Christians and their religion.
Sources

Footnotes

  1. 1 Kotobank, "天草四郎": Nakamura Tadashi in Nihon Daihyakka Zensho (Nipponica) (Shogakukan, 2018); Digital Daijisen; Digital-ban Nihon Jinmei Daijiten+Plus (Kodansha). source link (checked 20 Oct 2026)
  2. 2 Kotobank, "益田時貞": Nakamura Tadashi in Kaitei shinpan Sekai Daihyakka Jiten (Heibonsha); Hyakka Jiten Mypedia; Yamakawa Nihonshi Shōjiten; Seisenban Nihon Kokugo Daijiten. source link (checked 20 Oct 2026)
  3. 3 Kotobank, "島原の乱": Nakamura Tadashi in Sekai Daihyakka Jiten; Mypedia; Yamakawa; Kyodo News glossary. source link (checked 20 Oct 2026)
  4. 4 Léon Pagès, Histoire de la religion chrétienne au Japon depuis 1598 jusqu'à 1651, part 1 (Paris, 1869), pp. 842 to 848, drawing on Duarte Correa. Archive.org OCR text histoiredelarel02paggoog.
  5. 5 Amakusa City, "綸子地著色聖体秘蹟図指物(天草四郎陣中旗)" (updated 10 Apr 2025). source link (checked 20 Oct 2026)
  6. 6 Amakusa Television (amakusa.tv), report on the memorial service for the banner (undated). source link (checked 20 Oct 2026)
  7. 7 Amakusa City, "国指定重要文化財「天草四郎陣中旗」を特別公開!" (updated 4 Aug 2026). source link (checked 20 Oct 2026)
  8. 8 Our The Shimabara Uprising, 1637 to 1638 page (Murdoch's Japanese account; arrow letter; NAOJ dates).
  9. 9 Minamishimabara City, Hara Castle site plan, ch. 3 (memorial stones; excavations), citing 『史跡原城跡 保存活用計画』 (2021).
  10. 10 Kotobank, "益田好次," Digital-ban Nihon Jinmei Daijiten+Plus (Kodansha); and Kodansha's "天草四郎" entry for the date of death. source link (checked 20 Oct 2026)
  11. 11 Fr John the Baptist Kawamura Shinzō SJ, "殉教、今、高山右近に倣う意味," talk at the Feast of the Twenty-six Martyrs, Honjo Catholic Church, Tokyo, 7 Feb 2016 (transcript with questions). source link (checked 20 Oct 2026)
  12. 12 Japan Tourism Agency, Multilingual Commentary Database, "Christian heritage: Shimabara martyrdom site" (R2-00442). source link (checked 20 Oct 2026)
  13. 13 National Astronomical Observatory of Japan, "日本の暦日データベース" (ver. 1.2a), query for 15 to 20 Jan 1638, run 20 Oct 2026. source link
  14. 14 Our Hara Castle Ruins page.
  15. 15 Society of St Paul (San Paolo), "「カトリック入門」 第71回 島原・雲仙の殉教者" (Antonio's words, dates of February and May 1627 as given there). source link (checked 20 Oct 2026)

Additional sources used only in this page's features:

  • G1 Miyazaki Kentarō, "Roman Catholic Mission in Pre-Modern Japan," in Mullins (ed.), Handbook of Christianity in Japan (Brill, 2003), ch. 1, pp. 1 to 18. Same book as footnote 5.
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