十Christian Japan
Place guide · Hirado & Ikitsuki · Martyrdom site and sacred island

Nakaenoshima, Hirado

World Heritage component

A bare rock of an island lies in the strait between Hirado and Ikitsuki. Christians were executed on it. Why did their descendants cross rough water to it for two hundred years, and what did they bring home?

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Nakaenoshima was a place of death that became a place of grace. The hidden Christians of Hirado's west coast prayed to it as a martyrs' island and drew from its rocks the holy water they used for baptism and blessing.

The long low island of Nakaenoshima in the strait
The long low island of Nakaenoshima in the strait.Nakaenoshima. Indiana jo, CC BY-SA 4.0. Commons

In 60 seconds

The place in 5 steps. Each line is footnoted.

  1. 27 May 1622João Sakamoto Zaemon and Damian Deguchi, a boat master, are beheaded on the island.
  2. 5 Mar 1624The Deguchi and Sakamoto families are put to death there.
  3. Hidden CenturiesKasuga and the other villages of Hirado's west coast pray to the island and hold the omizutori, the taking of holy water, there.
  4. TodayLocal people still call it "San Juan-sama".
  5. 2018The island is listed as part of the World Heritage property.

Water from the rock

The island is about 400 metres long and 50 metres wide, and nobody lives on it. It rises 34.6 metres from the sea, about two kilometres off the north-west coast of Hirado island.

In the hidden years, people from and the other villages of the west coast came to it for the : they took the water that seeps out of its rocks as holy water. A children's guide from the prefecture puts it simply: for the hidden Christians it was a precious place, where they took the water seeping from the rock to make holy water.

Sources: water from the rock

The World Heritage page and the prefecture's おらしょ site record both the executions and the ceremony. A photograph of an omizutori is held by the Ikitsuki museum, .

On the mapThe island in the strait
Nakaenoshima, Kasuga village, Shima no Yakata museum. Full atlas and pin sources
The early ban years

The martyrs

Records say that in the first years of the ban, the Hirado domain executed Christians on the island. Because martyrs had died there, the hidden Christians honoured it as an island of martyrdom, .

The old Catholic martyrology of the Church of Japan, compiled by the Abbé Profillet, keeps some of their names. On 27 May 1622 two men were rowed out to the island: João Sakamoto Zaemon, who had given shelter to the Jesuit Father Camillo Costanzo, and (Profillet writes "Indégoutchi"), master of a boat. João's neck had been bound tight with a cord so that he could not speak. In the boat Damian took an oar and rowed with the oarsmen, singing the praises of God. On the island the officers tied a strip bearing a pagan formula round João's head; he could not tear it off, so he cried out as best he could that he was a Christian. He was beheaded first. Damian lifted up his head and kissed it, said "Praised be the Most Holy Sacrament!", and offered his own neck. He was forty-two. Note: our translation of Profillet. On 5 March 1624 his whole family followed him: his mother Isabel, seventy-four, his wife Beatriz, born at Tachinohama on Ikitsuki, and their four children, among them Madalena, thirteen, João, nine, and little Isabel, seven, who was struck down on her mother's body. As the boat brought them to the island, the family of João Sakamoto Zaemon, a martyr of 1622, arrived for the same end. The two families greeted each other with love and promised to meet again in heaven. Sakamoto's widow Maria and her son Pedro, ten, watched the others die and then were killed; her three grown sons were tied in straw sacks and thrown into the open sea.

The sociologist Sakai Nobuo, working from Pagès' history, also names the Deguchi family and João Sakamoto among those who died on Nakaenoshima, and calls it the place where many Kirishitan of Ikitsuki met their deaths.

The martyrs of Nakaenoshima were not among the 188 beatified at Nagasaki in 2008: the bishops' list of the 188 names only the Nishi family, martyred in 1609, for Ikitsuki, and none for Hirado. Profillet listed them as Venerable.

Local people still have several names for it: "San Juan-sama", "Gosantai-sama" and "Omukae-sama".

Sources: the martyrs

The names come from the Jesuit and other letters gathered by Léon Pagès in the nineteenth century and set out, martyr by martyr, in Profillet's martyrology; the prefecture's pages give the place and its meaning for the hidden Christians.

On the mapThe holy places of Kasuga
Nakaenoshima, Kasuga village, Mt Yasumandake. Full atlas and pin sources
Today

Seen from the shore

The prefecture's guide for schools marks a viewing point for Nakaenoshima on its map of Hirado. From Kasuga, below its holy mountain , the island can be seen out at sea.

Timeline

The dated story

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

  1. Early ban yearsChristians executed on the island by Hirado domain
  2. 27 May 1622João Sakamoto Zaemon and Damian Deguchi beheaded on the island
  3. 5 Mar 1624Deguchi and Sakamoto families martyred
  4. Hidden CenturiesOmizutori ceremony by the west-coast villages
  5. 2010Hirado island cultural landscape selected as Important Cultural Landscape
  6. 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
NakaenoshimaIsland of the martyrs33.3732515, 129.4651713OpenStreetMap way/130937882
Kasuga villageThe village that prayed to it33.3412219, 129.443182OpenStreetMap node/4583423112
Mt YasumandakeHoly mountain of Kasuga33.337027, 129.4658571OpenStreetMap node/9625865289; Wikidata Q11450944
Shima no Yakata museumHolds a photograph of the omizutori33.355404, 129.430941OpenStreetMap node/1423809624
Nakaenoshima viewpointMarked on the prefecture's school maplocation not separately pinnednot yet pinned
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Glossary

Words on this page

omizutori お水取り
The taking of holy water from the rock of Nakaenoshima.
junkyō 殉教
Martyrdom: dying rather than give up the faith.
Sources

Footnotes

Translations from Japanese sources are ours.

  1. Nagasaki Prefecture, World Heritage Division, "平戸の聖地と集落(中江ノ島)" (component of the Hidden Christian Sites), source link (checked 19 Oct 2026)
  2. Nagasaki Prefecture, おらしょ こころ旅, "中江ノ島," source link
  3. Nagasaki Prefecture, World Heritage school guide for Hirado (PDF), source link
  4. UNESCO World Heritage Centre, "Hidden Christian Sites in the Nagasaki Region" (no. 1495, 2018), source link
  5. Nagasaki Prefecture, おらしょ こころ旅, "平戸市生月町博物館・島の館," source link
  6. Louis Charles Profillet, *Le martyrologe de l'Église du Japon, 1549 to 1649*, vol. 2 (Paris), entries "Indégoutchi, Damien", "Isabelle", "Marie" and the narrative for 5 March 1624, pp. 175 to 176, source link
  7. Sakai Nobuo, "生月のかくれキリシタン研究," *哲學年報* 49 (Kyushu University, 1990): 115 to 146, source link
  8. Louis Charles Profillet, *Le martyrologe de l'Église du Japon, 1549 to 1649*, vol. 1 (Paris), "Les bienheureux", narrative of Bl. Camillo Costanzo, pp. 124 to 125, source link
  9. Catholic Bishops' Conference of Japan, 「日本188殉教者名簿」 (27 Aug 2007), Nagasaki diocese, "生月の殉教者(3人)", nos. 15 to 17, source link (checked 20 Oct 2026)
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