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Hii River
The is a river on the island of Honshu in Shimane Prefecture and Tottori Prefecture, Japan. With a length of 153 km and catchment of 2540 km2, it is the largest river in the east of Shimane Prefecture. It flows through the cities of Izumo, Shimane, Izumo and Matsue and through the lakes Lake Shinji, Shinji and Nakaumi and discharges into the Sea of Japan. In antiquity the river was known as "Izumo-no-okawa" (出雲大川, "The great Izumo river"). The River Hii significantly changed its course and transformed the land several times during last 7 millennia. Alluvial deposits carried by the river joined the Shimane peninsula to the mainland, which may have been represented in the "Kunibiki-shinwa" myth. Since the 17th century it flows into lake Shinji, and since the early 20th century continues to the Sea of Japan. Hii river frequently caused floods in its catchment. On the other hand, it was and currently is an important source of drinking and irrigation water. During the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 in the south. The Japanese archipelago consists of four major islands—Hokkaido, Honshu, Shikoku, and Kyushu—and List of islands of Japan, thousands of smaller islands, covering . Japan has a population of over 123 million as of 2025, making it the List of countries and dependencies by population, eleventh-most populous country. The capital of Japan and List of cities in Japan, its largest city is Tokyo; the Greater Tokyo Area is the List of largest cities, largest metropolitan area in the world, with more than 37 million inhabitants as of 2024. Japan is divided into 47 Prefectures of Japan, administrative prefectures and List of regions of Japan, eight traditional regions. About three-quarters of Geography of Japan, the countr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Last Glacial Maximum
The Last Glacial Maximum (LGM), also referred to as the Last Glacial Coldest Period, was the most recent time during the Last Glacial Period where ice sheets were at their greatest extent between 26,000 and 20,000 years ago. Ice sheets covered much of Northern North America, Northern Europe, and Asia and profoundly affected Earth's climate by causing a major expansion of deserts, along with a large drop in sea levels. Based on changes in position of ice sheet margins dated via cosmogenic nuclide, terrestrial cosmogenic nuclides and radiocarbon dating, growth of ice sheets in the southern hemisphere commenced 33,000 years ago and maximum coverage has been estimated to have occurred sometime between 26,500 years ago and 20,000 years ago. After this, deglaciation caused an abrupt rise in sea level. Decline of the West Antarctica ice sheet occurred between 14,000 and 15,000 years ago, consistent with evidence for another abrupt rise in the sea level about 14,500 years ago. Glacier fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erosion
Erosion is the action of surface processes (such as Surface runoff, water flow or wind) that removes soil, Rock (geology), rock, or dissolved material from one location on the Earth's crust#Crust, Earth's crust and then sediment transport, transports it to another location where it is deposit (geology), deposited. Erosion is distinct from weathering which involves no movement. Removal of rock or soil as clastic sediment is referred to as ''physical'' or ''mechanical'' erosion; this contrasts with ''chemical'' erosion, where soil or rock material is removed from an area by Solvation, dissolution. Eroded sediment or solutes may be transported just a few millimetres, or for thousands of kilometres. Agents of erosion include rainfall; bedrock wear in rivers; coastal erosion by the sea and Wind wave, waves; glacier, glacial Plucking (glaciation), plucking, Abrasion (geology), abrasion, and scour; areal flooding; Aeolian processes, wind abrasion; groundwater processes; and Mass wastin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tatara (furnace)
The is a traditional Japanese Metallurgical furnace, furnace used for smelting iron and steel. The word later also came to mean the entire building housing the furnace. The traditional steel in Japan comes from ironsand processed in a special way, called the tatara system.https://www.jsme.or.jp/tsd/ICBTT/conference02/TatsuoINOUE.html "Science of Tatara and Japanese Sword - Traditional Technology viewed from Modern Science" by Tatsuo INOUE Iron ore was used in the first steel manufacturing in Japan. Tatara steelmaking process using ironsand was conducted in the Kibi Province, which later became the base of the Japanese sword#Classification by school, Bizen school of swordsmithing, around the middle of the sixth century, and steelmaking using ironsand is thought to have spread from Kibi to various places in Japan. In western Japan, a low box-shaped furnace different from the Chinese and Korean style was used to refine iron, and in eastern Japan, both a low box-shaped furnace and a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ironsand
Ironsand, also known as iron-sand or iron sand, is a type of sand with heavy concentrations of iron. It is typically dark grey or blackish in color. It is composed mainly of magnetite, Fe3O4, and also contains small amounts of titanium, silica, manganese, calcium and vanadium. Ironsand has a tendency to heat up in direct sunlight, causing temperatures high enough to cause minor burns. As such it forms a hazard in New Zealand at popular west-coast surf beaches such as Piha. Occurrence Ironsand is found worldwide. Although the iron mineral composition of the ironsand is mostly magnetite, the sand is usually mixed with other types of sand that wash downriver or ashore from mountainous or underwater deposits. The exact composition of the sand mixture may vary drastically even in the same geographic region. In some areas the sand may contain mostly quartz, while in others the sand may be made primarily from volcanic rock such as basalt, depending on the types of minerals along th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yamata No Orochi
Yamata no Orochi (ヤマタノオロチ, also written as 八岐大蛇, 八俣遠呂智 or 八俣遠呂知) is a legendary eight-headed and eight-tailed serpent that appears in Japanese mythology. Both the ''Kojiki'' and ''Nihon Shoki'' record the serpent as being slain by the god Susanoo-no-Mikoto, Susanoo, in order to rescue the goddess Kushinadahime, Kushinada-hime. It is also noted that the Kusanagi no Tsurugi, Kusanagi-no-Tsurugi, one of the Imperial Regalia of Japan, Three Sacred Treasures, was found within the serpent's tail. In local tradition, Yamata no Orochi was believed to have survived their encounter with Susanoo and fled to Mount Ibuki, where they were venerated as Ibuki Daimyōjin (伊吹大明神). Additionally, figures such as Emperor Antoku and the Longnü, Nāga Maiden have been identified as incarnations of Yamata no Orochi. Name The name ''Yamata no Orochi'' (八俣遠呂智 in the ''Kojiki'', 八岐大蛇 in the ''Nihon Shoki'') is variously translated as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Susanoo-no-Mikoto
__FORCETOC__ Susanoo (, ; Historical kana orthography, historical orthography: , ), often referred to by the honorific title Susanoo-no-Mikoto (), is a in Japanese mythology. The younger brother of Amaterasu, goddess of the sun and mythical ancestress of the Imperial House of Japan, Japanese imperial line, he is a multifaceted deity with contradictory characteristics (both good and bad), being portrayed in various stories either as a wild, impetuous god associated with the sea and storms, as a heroic figure who killed a monstrous serpent, or as a local deity linked with the harvest and agriculture. Shinbutsu shūgō, Syncretic beliefs of the Gion cult that arose after Buddhism in Japan, the introduction of Buddhism to Japan also saw Susanoo becoming conflated with deities of pestilence and disease. Susanoo, alongside Amaterasu and the earthly Ōkuninushi (also Ōnamuchi) – depicted as either Susanoo's son or scion depending on the source – is one of the central deities of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Izumo Taisha
, officially Izumo Ōyashiro, is one of the most ancient and important Shinto shrines in Japan. No record gives the date of establishment. Located in Izumo, Shimane Prefecture, it is home to two major festivals. It is dedicated to the god , famous as the Shinto deity of marriage and to Kotoamatsukami, distinguishing heavenly ''kami''. The shrine is believed by many to be the oldest Shinto shrine in Japan, even predating the Ise Grand Shrine. A style of architecture, ''taisha-zukuri'', takes its name from the main hall of Izumo-taisha. That hall, and the attached buildings, were designated National Treasures of Japan in 1952. According to tradition, the hall was previously much taller than at present. The discovery in the year 2000 of the remains of enormous pillars has lent credence to this. The shrine has been rebuilt every 60 to 70 years to maintain the power of the ''kami'' and maintain architectural techniques. This regular rebuilding process is called " Sengū" (遷宮) a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silla
Silla (; Old Korean: wikt:徐羅伐#Old Korean, 徐羅伐, Yale romanization of Korean, Yale: Syerapel, Revised Romanization of Korean, RR: ''Seorabeol''; International Phonetic Alphabet, IPA: ) was a Korean kingdom that existed between 57 BCE – 935 CE and was located on the southern and central parts of the Korea, Korean Peninsula. Silla, along with Paekje and Koguryeo, formed the Three Kingdoms of Korea. Silla had the lowest population of the three, approximately 850,000 people (170,000 households), significantly smaller than those of Paekje (3,800,000 people) and Koguryeo (3,500,000 people). Its foundation can be traced back to the semi-mythological figure of Hyeokgeose of Silla (Old Korean: *pulkunae, "light of the world"), of the Park (Korean surname), Park clan. The country was first ruled intermittently by the Miryang Park clan for 232 years and the Seok (Korean surname)#Wolseong, Wolseong Seok clan for 172 years and beginning with the reign of Michu of Silla, Mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclastic Flow
A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of but is capable of reaching speeds up to . The gases and tephra can reach temperatures of about . Pyroclastic flows are the deadliest of all volcanic hazards and are produced as a result of certain explosive eruptions; they normally touch the ground and hurtle downhill or spread laterally under gravity. Their speed depends upon the density of the current, the volcanic output rate, and the gradient of the slope. Origin of term The word ''pyroclast'' is derived from the Greek (''pýr''), meaning "fire", and (''klastós''), meaning "broken in pieces". A name for pyroclastic flows that glow red in the dark is (French, "burning cloud"); this was notably used to describe the disastrous 1902 eruption of Mount Pelée on Martinique, a Frenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Sanbe
Mount Sanbe, also known as Sanbesan, is an active stratovolcano in Ōda, Shimane Prefecture. The highest peak, Osanbe, has an elevation of . At the center of the volcano is a caldera across. The volcano's composition is mainly dacite and andesite. Volcanic activity was believed to have started 100 thousand years ago. The volcano frequently produces explosive eruptions with several classified as Plinian eruptions. All of these explosive eruptions occurred during the Pleistocene while one occurred in the Holocene at the Taiheizan lava dome approximately 3,700 years ago. The Holocene eruption triggered pyroclastic flows down the northeastern and southeastern flanks, reaching the Hayamizu River in the south. More recent eruptions have taken place but they are not precisely dated. See also * List of volcanoes in Japan * List of mountains in Japan A list is a set of discrete items of information collected and set forth in some format for utility, entertainment, or other purpose ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sediment
Sediment is a solid material that is transported to a new location where it is deposited. It occurs naturally and, through the processes of weathering and erosion, is broken down and subsequently sediment transport, transported by the action of wind, water, or ice or by the force of gravity acting on the particles. For example, sand and silt can be carried in suspension (chemistry), suspension in river water and on reaching the sea bed deposited by sedimentation; if buried, they may eventually become sandstone and siltstone (sedimentary rocks) through lithification. Sediments are most often transported by water (fluvial, fluvial processes), but also wind (aeolian processes) and glaciers. Beach sands and stream channel, river channel deposits are examples of fluvial transport and deposition (geology), deposition, though sediment also often settles out of slow-moving or standing water in lakes and oceans. Desert sand dunes and loess are examples of aeolian transport and deposition. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
