1854 Ansei-Tokai earthquake

E378922

historical event megathrust earthquake natural disaster tsunami-generating earthquake

The 1854 Ansei-Tokai earthquake was a major Edo-period megathrust earthquake and tsunami that struck central Japan, causing widespread destruction and loss of life along the Pacific coast.

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All labels observed (5)

Label	Occurrences
1854 Ansei-Tokai earthquake canonical	3
Ansei great earthquakes	2
Ansei Edo earthquake	1
Ansei Tōkai earthquake	1
Ansei-Tōkai jishin	1

How this entity was disambiguated

This entity first appeared as the object of triple T3646889 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: 1854 Ansei-Tokai earthquake
Context triple: [Nankai Trough, associatedEarthquake, 1854 Ansei-Tokai earthquake]

A. 1944 Tonankai earthquake
The 1944 Tonankai earthquake was a powerful undersea megathrust earthquake off the coast of Japan that generated a destructive tsunami and caused extensive damage and loss of life in the Tōkai and Kii Peninsula regions during World War II.
B. Great Kanto earthquake
The Great Kanto earthquake was a devastating 1923 seismic disaster that struck the Tokyo-Yokohama region of Japan, causing massive destruction and loss of life.
C. 1946 Nankai earthquake
The 1946 Nankai earthquake was a powerful megathrust earthquake off the coast of southwestern Japan that generated a destructive tsunami and caused widespread damage and casualties in the Nankai region.
D. Great Hanshin earthquake
The Great Hanshin earthquake was a devastating 1995 seismic disaster in Japan that caused widespread destruction and loss of life, particularly in the city of Kobe.
E. 2011 Tōhoku earthquake and tsunami
The 2011 Tōhoku earthquake and tsunami was a devastating magnitude 9.0 undersea megathrust earthquake off Japan’s northeastern coast that triggered massive tsunamis, widespread destruction, and the Fukushima Daiichi nuclear disaster.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: 1854 Ansei-Tokai earthquake
Target entity description: The 1854 Ansei-Tokai earthquake was a major Edo-period megathrust earthquake and tsunami that struck central Japan, causing widespread destruction and loss of life along the Pacific coast.

A. 1944 Tonankai earthquake
The 1944 Tonankai earthquake was a powerful undersea megathrust earthquake off the coast of Japan that generated a destructive tsunami and caused extensive damage and loss of life in the Tōkai and Kii Peninsula regions during World War II.
B. Great Kanto earthquake
The Great Kanto earthquake was a devastating 1923 seismic disaster that struck the Tokyo-Yokohama region of Japan, causing massive destruction and loss of life.
C. 1946 Nankai earthquake
The 1946 Nankai earthquake was a powerful megathrust earthquake off the coast of southwestern Japan that generated a destructive tsunami and caused widespread damage and casualties in the Nankai region.
D. Great Hanshin earthquake
The Great Hanshin earthquake was a devastating 1995 seismic disaster in Japan that caused widespread destruction and loss of life, particularly in the city of Kobe.
E. 2011 Tōhoku earthquake and tsunami
The 2011 Tōhoku earthquake and tsunami was a devastating magnitude 9.0 undersea megathrust earthquake off Japan’s northeastern coast that triggered massive tsunamis, widespread destruction, and the Fukushima Daiichi nuclear disaster.
F. None of above. chosen

Statements (39)

Predicate	Object
instanceOf	historical event ⓘ megathrust earthquake ⓘ natural disaster ⓘ tsunami-generating earthquake ⓘ
affectedArea	Ise Bay coast ⓘ Pacific coast of central Honshu ⓘ Suruga Bay coast ⓘ Tōkai coastal communities ⓘ
alsoKnownAs	Ansei-Tōkai jishin ⓘ linked to: 1854 Ansei-Tokai earthquake
casualties	thousands of deaths ⓘ
cause	subduction of the Philippine Sea Plate beneath the Eurasian Plate ⓘ
country	Japan ⓘ
damage	severe tsunami inundation of coastal settlements ⓘ widespread destruction along the Pacific coast ⓘ
date	1854-12-23 ⓘ
epicenterRegion	off the Tōkai coast ⓘ
era	Ansei era ⓘ linked to: Ansei Edo period ⓘ
followedBy	1854 Ansei-Nankai earthquake ⓘ
geologicalSignificance	evidence for segmented rupture along the Nankai Trough ⓘ
historicalRecords	depicted in contemporary woodblock prints ⓘ documented in Edo-period chronicles ⓘ recorded in temple and shrine documents ⓘ
impact	destruction of houses and infrastructure in coastal towns ⓘ loss of life among fishing and maritime communities ⓘ
languageOfName	Japanese ⓘ
locatedIn	Tōkai region ⓘ central Japan ⓘ
locatedOn	Pacific coast of Japan ⓘ
magnitude	~8.4 Mw ⓘ
partOf	Ansei great earthquakes ⓘ linked to: 1854 Ansei-Tokai earthquake
precedes	modern Tōkai earthquake hazard scenarios ⓘ
region	Honshu ⓘ
sequence	part of a series of large 19th-century Nankai Trough earthquakes ⓘ
tectonicSetting	Nankai Trough ⓘ
triggered	tsunami ⓘ
tsunamiHeight	several meters in some coastal areas ⓘ
tsunamiType	local tsunami ⓘ
usedFor	paleoseismic and tsunami hazard assessment in central Japan ⓘ

How these facts were elicited