Ezo Salamander
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Ezo Salamander
The Ezo salamander (''Hynobius retardatus''), also known as the Hokkaido salamander, Noboribetsu salamander, or Ezo Sanshouo in Japanese is a species of salamander in the family Hynobiidae. Prior to 1923 the species was also classified by the binomial scientific name ''Satobius retardatus''. ''H. retardatus'' is endemic to Japan's northernmost prefecture, the island of Hokkaido. The species is a pond-type salamander, and its natural habitats are temperate forests, temperate shrubland, swamps, freshwater marshes, intermittent freshwater marshes, freshwater springs, irrigated land, canals, and ditches. In 1923, the species was discovered by American herpetologist Emmett Reid Dunn, the same year the Hida and Amber salamander species were discovered. ''H. retardatus'' was first observed on the eastern edge of the Noboribetsu region within Lake Kuttara (Kuttara-ko), although this specific population is now extinct. The name Ezo comes from Yezo, the old name of Hokkaido.Goris, R.C. an ...
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Japanese Language
is spoken natively by about 128 million people, primarily by Japanese people and primarily in Japan, the only country where it is the national language. Japanese belongs to the Japonic or Japanese- Ryukyuan language family. There have been many attempts to group the Japonic languages with other families such as the Ainu, Austroasiatic, Koreanic, and the now-discredited Altaic, but none of these proposals has gained widespread acceptance. Little is known of the language's prehistory, or when it first appeared in Japan. Chinese documents from the 3rd century AD recorded a few Japanese words, but substantial Old Japanese texts did not appear until the 8th century. From the Heian period (794–1185), there was a massive influx of Sino-Japanese vocabulary into the language, affecting the phonology of Early Middle Japanese. Late Middle Japanese (1185–1600) saw extensive grammatical changes and the first appearance of European loanwords. The basis of the standard dialect moved f ...
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Noboribetsu
is a city in Iburi Subprefecture, Hokkaido, Japan. Part of Shikotsu-Toya National Park, it is southwest of Sapporo, west of Tomakomai and northeast of Hakodate. As of September 2016, the city has an estimated population of 49,523, and a population density of 230 persons per km2. The total area is 212.11 km2. The city office is in Horobetsu. The town of Noboribetsu is at the mouth of the Noboribetsu river and is therefore a much narrower area. Geography The mountains dominate the west and north while the plains dominate around five km within the coastline. There are three towns along the Pacific Ocean: from northeast to southwest, Noboribetsu, Horobetsu and Washibetsu. These ''betsu'' are derived from "river" in the Ainu language. Noboribetsu is on the Noboribetsu River. Horobetsu and Washibetsu are on the Iburi-horobetsu River and the Washibetsu River respectively. Origin of name The name, Noboribetsu, derives from an Ainu word, ''nupur-pet,'' which means dark-colored r ...
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Iburi Subprefecture
is a subprefecture of Hokkaido Prefecture, Japan. Geography Located in south-central Hokkaido, Iburi stretches East-West and North-South. Iburi covers an area of . Iburi borders Oshima Subprefecture to the West, Shiribeshi, Ishikari, and Sorachi Subprefectures to the North, and Hidaka Subprefecture to the East. On its South side, Iburi has of coastline with the Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continen .... Municipalities Mergers History *1897: Muroran Subprefecture was established. *1922: Muroran Subprefecture was renamed Iburi Subprefecture. References External linksOfficial website Subprefectures in Hokkaido {{Hokkaido-geo-stub ...
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Obihiro
is a city in Tokachi Subprefecture, Hokkaido, Japan. Obihiro is the only designated city in the Tokachi area. As of February 29, 2020, the city has an estimated population of 165,851. The next most populous municipality in Tokachi is the adjacent town of Otofuke, with less than a third of Obihiro's population. The city had approximately 500 foreign residents in 2008. The city contains the headquarters of the Fifth Division of the Northern Army of the Japan Ground Self-Defense Force. It also hosts the Rally Japan World Rally Championship-event. In 2008, Obihiro was designated a "model environmental city" in Japan. Geography and transportation The Tokachi-Obihiro Airport is located to the south of downtown Obihiro, but is still within the city's borders. It takes 50 minutes by car or 1 hour by bus from Obihiro Station to the airport. The next major airport nearby is New Chitose Airport. From Obihiro, it takes 2 hrs 30 mins to get New Chitose Airport by train and just over 4 h ...
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Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continents of Asia and Oceania in the west and the Americas in the east. At in area (as defined with a southern Antarctic border), this largest division of the World Ocean—and, in turn, the hydrosphere—covers about 46% of Earth's water surface and about 32% of its total surface area, larger than Earth's entire land area combined .Pacific Ocean
. '' Britannica Concise.'' 2008: Encyclopædia Britannica, Inc.
The centers of both the



Japanese Archipelago
The Japanese archipelago (Japanese: 日本列島, ''Nihon rettō'') is a archipelago, group of 6,852 islands that form the country of Japan, as well as the Russian island of Sakhalin. It extends over from the Sea of Okhotsk in the northeast to the East China Sea, East China and Philippine Seas in the southwest along the Pacific Ocean coast of the Eurasian continent, and consists of three island arcs from north to south: the Northeastern Japan Arc, Northeastern and Southwestern Japan Arcs, and the Ryukyu Islands, Ryukyu Island Arc. The Kuril Islands, Kuril Island Arc, the Daitō Islands, and the Nanpō Islands are not parts of the archipelago. Japan is the largest island country in East Asia and the list of island countries, fourth-largest island country in the world with . It has an Exclusive economic zone of Japan, exclusive economic zone of . Terminology The term "mainland Japan" is used to distinguish the large islands of the Japanese archipelago from the remote, smaller isl ...
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Pleistocene
The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name is a combination of Ancient Greek grc, label=none, πλεῖστος, pleīstos, most and grc, label=none, καινός, kainós (latinized as ), 'new'. At the end of the preceding Pliocene, the previously isolated North and South American continents were joined by the Isthmus of Panama, causing Great American Interchang ...
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Pliocene
The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58See the 2014 version of the ICS geologic time scale
million years ago. It is the second and most recent epoch of the Neogene Period in the . The Pliocene follows the Epoch and is followed by the Epoch. Prior to the 2009 ...
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Miocene
The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene is preceded by the Oligocene and is followed by the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by a single distinct global event but consist rather of regionally defined boundaries between the warmer Oligocene and the cooler Pliocene Epoch. During the Early Miocene, the Arabian Peninsula collided with Eurasia, severing the connection between the Mediterranean and Indian Ocean, and allowing a faunal interchange to occur between Eurasia and Africa, including the dispersal of proboscideans into Eurasia. During the ...
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Land Bridges Of Japan
Due to changes in sea level, Japan has at various times been connected to the continent by , with continental Russia to the north via the Sōya Strait, Sakhalin, and the Mamiya Strait, and with the Korean Peninsula to the southwest, via the Tsushima Strait and Korea Strait. Land bridges also connected the Japanese Islands with each other. These land bridges enabled the migration of terrestrial fauna from the continent and their dispersal within Japan. Geological background Around 25 million years ago, the Sea of Japan began to open, separating Japan from the continent and giving rise to the Japanese island arc system of today. The Sea of Japan as a back-arc basin was open both to the northeast and to the southwest by 14 Ma, while marine transgression further contributed to the isolation and insulation of Japan. Due to the level of tectonic activity in the area and significant subsidence of the Japanese Islands since the Miocene, exact quantification of historic sea level chang ...
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Eurasia
Eurasia (, ) is the largest continental area on Earth, comprising all of Europe and Asia. Primarily in the Northern and Eastern Hemispheres, it spans from the British Isles and the Iberian Peninsula in the west to the Japanese archipelago and the Russian Far East to the east. The continental landmass is bordered by the Atlantic Ocean and Africa to the west, the Pacific Ocean to the east, the Arctic Ocean to the north, and by Africa, the Mediterranean Sea, and the Indian Ocean to the south. The division between Europe and Asia as two continents is a historical social construct, as many of their borders are over land; thus, in some parts of the world, Eurasia is recognized as the largest of the six, five, or four continents on Earth. In geology, Eurasia is often considered as a single rigid megablock. However, the rigidity of Eurasia is debated based on paleomagnetic data. Eurasia covers around , or around 36.2% of the Earth's total land area. It is also home to the largest ...
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Hynobius
''Hynobius'' is a genus of salamander (Asian salamanders) in the family Hynobiidae, occurring in Japan, Korea, China, Taiwan and Far East Russia. It contains these species: Species Species included (as of March 2021): *'' Hynobius abei'' Sato, 1934 *'' Hynobius abuensis'' Matsui, Okawa, Nishikawa, and Tominaga, 2019 *'' Hynobius akiensis'' Matsui, Okawa, and Nishikawa, 2019 *'' Hynobius amakusaensis'' Nishikawa and Matsui, 2014 *'' Hynobius amjiensis'' Gu, 1992 *'' Hynobius arisanensis'' Maki, 1922 *'' Hynobius bakan'' Matsui, Okawa, and Nishikawa, 2019 *'' Hynobius boulengeri'' (Thompson, 1912) *'' Hynobius chinensis'' Günther, 1889 *'' Hynobius dunni'' Tago, 1931 *'' Hynobius formosanus'' Maki, 1922 *''Hynobius fossigenus'' Okamiya, Sugawara, Nagano, and Poyarkov, 2018 *'' Hynobius fucus'' Lai and Lue, 2008 *'' Hynobius glacialis'' Lai and Lue, 2008 *'' Hynobius geojeensis'' Min and Borzée, 2021 *'' Hynobius guabangshanensis'' Shen, 2004 *'' Hynobius guttatus'' Tominaga, Ma ...
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