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Japan has significant diversity in flora. Of approximately 5,600 total vascular plant species, almost 40% are endemic. [1] This richness is due to the significant variation in latitude and altitude across the country, a diversity of climatic conditions due to monsoons, and multiple geohistorical incidences of connections with the mainland.
Japan lies at the convergence of three terrestrial realms, the Palearctic, Indomalaya, and Oceania, and its flora and fauna combine elements from all three.The ecoregions that cover the main islands of Japan, Honshū, Hokkaidō, Kyūshū, and Shikoku, along with the nearby islands, are considered part of the Palearctic realm.
The Hokkaidō deciduous forests ecoregion (WWF ID: PA0423) covers the northern and southern coasts of the island of Hokkaido, the northernmost of the main islands of Japan. The region sits in the transition zone between the colder subarctic forests to the north and the more temperate forests to the south.
The Japanese taimen (Hucho perryi) is the largest fish to enter freshwater in Japan and may reach sizes of up to 2 meters in length. The Japanese taimen is a critically endangered species including the Japanese populations which are restricted to the rivers and surrounding ocean of Hokkaido. Also present is the Japanese dace (Tribolodon ...
The climate is cooler in the north of Honshu than the south, with deciduous mixed trees typified by Japanese beech (Fagus crenata), Jolcham oak (Quercus serrata), Castanopsis sieboldii, Picea jezoensis, Pinus thunbergii, Pinus pumila, Prunus nipponica, Cryptomeria japonica, Sciadopitys verticillata, Salix pierotii, Camphora officinarum, Cercidiphyllum japonicum, Fagus crenata, Carpinus ...
Japan is an archipelagic country comprising a stratovolcanic archipelago over 3,000 km (1,900 mi) along the Pacific coast of East Asia. [8] It consists of 14,125 islands. [9] [10] The four main islands are Hokkaido, Honshu, Kyushu, and Shikoku.
Japan is within the larger region of East Asia. For the purposes of this category, "Japan" is defined in accordance with the World Geographical Scheme for Recording Plant Distributions . That is, the geographic region is defined as including the following areas, typically defined by the political boundaries of its constituents:
The Honshū alpine conifer forests ecoregion covers 4,400 square miles (11,000 km 2) in the high-elevation mountains of central Honshū and the Oshima Peninsula of Hokkaido, Japan. It is a temperate coniferous forest ecoregion in the Palearctic realm.