is a
volcanic
A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
On Earth, volcanoes are most often fo ...
desert island
An uninhabited island, desert island, or deserted island, is an island, islet or atoll which lacks permanent human population. Uninhabited islands are often depicted in films or stories about shipwrecked people, and are also used as stereotypes ...
located in the
Philippine Sea
The Philippine Sea is a List of seas#Marginal seas by ocean, marginal sea of the Pacific Ocean, Western Pacific Ocean east of the list of islands of the Philippines, Philippine Archipelago (hence the name) and the List of seas#Largest seas ...
approximately south off the coast of
Tokyo
Tokyo, officially the Tokyo Metropolis, is the capital of Japan, capital and List of cities in Japan, most populous city in Japan. With a population of over 14 million in the city proper in 2023, it is List of largest cities, one of the most ...
, at the southernmost tip of the
Izu archipelago,
Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
. Though only 0.01 km
2 in area, it reaches almost 100 meters in height.
Geography

The island is a
basalt
Basalt (; ) is an aphanite, aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the planetary surface, surface of a terrestrial ...
pillar with sheer sides, the only visible portion of a submarine
volcanic caldera extending south-east at an average depth of . The above sea-level portion measures approximately 84 metres east-west and 56 metres north-south, with a summit height of . The sides of the island features several
geological joints facing the water's surface.
The island lies approximately south off the coast of
Tokyo
Tokyo, officially the Tokyo Metropolis, is the capital of Japan, capital and List of cities in Japan, most populous city in Japan. With a population of over 14 million in the city proper in 2023, it is List of largest cities, one of the most ...
and from the nearby uninhabited island of
Torishima. Due to its shape and heavy seas, it is almost impossible to disembark on the island, although attempts have been made by
rock climbers successfully in 1972 and 2003 (though several accidents have been registered). A scientific expedition visited the island in 2017 along with an
NHK
, also known by its Romanization of Japanese, romanized initialism NHK, is a Japanese public broadcasting, public broadcaster. It is a statutory corporation funded by viewers' payments of a television licence, television license fee.
NHK ope ...
film crew. The expedition was featured in an episode of the documentary series NHK Documentary, which aired in February 2019.
The site is also known for the transparency of its surrounding waters and abundance of
fish
A fish (: fish or fishes) is an aquatic animal, aquatic, Anamniotes, anamniotic, gill-bearing vertebrate animal with swimming fish fin, fins and craniate, a hard skull, but lacking limb (anatomy), limbs with digit (anatomy), digits. Fish can ...
, which makes it a popular
scuba diving
Scuba diving is a Diving mode, mode of underwater diving whereby divers use Scuba set, breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. The word ''scub ...
spot.
The only vegetation on the island is a few clumps of
Poaceae
Poaceae ( ), also called Gramineae ( ), is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos, the grasses of natural grassland and species cultivate ...
, and the island attracts a small number of
seabird
Seabirds (also known as marine birds) are birds that are adaptation, adapted to life within the marine ecosystem, marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent ...
s for nesting. Bird guano makes white streaks on the rock.
History
On April 9, 1788, British merchant sailor
John Meares sighted what he came to describe as “the most marvellous thing” he had ever set his eyes on, a small island he and the ship’s crew decided to baptize as
Lot's Wife, referring to the
Book of Genesis
The Book of Genesis (from Greek language, Greek ; ; ) is the first book of the Hebrew Bible and the Christian Old Testament. Its Hebrew name is the same as its incipit, first word, (In the beginning (phrase), 'In the beginning'). Genesis purpor ...
19:26. The Japanese name Sōfu Iwa (“The Widow Crag”) is rather freely translated from English.
During the
Pacific War
The Pacific War, sometimes called the Asia–Pacific War or the Pacific Theatre, was the Theater (warfare), theatre of World War II fought between the Empire of Japan and the Allies of World War II, Allies in East Asia, East and Southeast As ...
, Sofu Gan was used by US Navy submariners as a reference marker for calibration of instruments as they entered Japanese waters.
[O'Kane, Richard H. ''Clear the Bridge! The War Patrols of the USS Tang'' London Macdonald & Jane's 1978 p.210 ] The uninhabited and uninhabitable island was the southernmost Japanese island not occupied by the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
after the 1952
San Francisco Treaty. It is currently administratively part of Tokyo Metropolis.
See also
*
Ball's Pyramid
Ball's Pyramid is an uninhabited islet in the Pacific Ocean located southeast of Lord Howe Island, between Australia and New Zealand. The steep rocky basalt outcrop is the eroded plug of a shield volcano and caldera that formed 6.4million ye ...
*
Rockall
Rockall () is a high, uninhabitable granite islet in the North Atlantic Ocean. It is west of Soay, St Kilda, Scotland; northwest of Tory Island, Ireland; and south of Iceland.
The nearest permanently inhabited place is North Uist, east in ...
*
Shag Rocks (South Georgia)
*
Black Rock, South Georgia
*
Desert island
An uninhabited island, desert island, or deserted island, is an island, islet or atoll which lacks permanent human population. Uninhabited islands are often depicted in films or stories about shipwrecked people, and are also used as stereotypes ...
*
List of islands
This is a list of the lists of islands in the world grouped by country, by continent, by body of water
A body of water or waterbody is any significant accumulation of water on the surface of Earth or another planet. The term most often refer ...
*
List of islands in Japan
References
External links
Sofugan: Japan Coast Guard submarine volcano database
* - Japan Meteorological Agency
{{DEFAULTSORT:Lot's Wife (Crag)
Izu Islands
Uninhabited islands of Japan
Extinct volcanoes of Asia
Stacks of Japan
Islands of Tokyo
Lot (biblical person)