HomeFish encyclopediaSharks and RaysGround sharksHoundsharksJapanese topeshark Japanese topeshark (Hemitriakis japanica) Scientific name: Hemitriakis japanica M?ller & Henle, 1839 The Japanese topeshark (Hemitriakis japanica) is a marine fish of the family Triakidae. BiologyOccurs close inshore and offshore down to at least 100 m depth. Presumably feeds on small fishes, cephalopods and crustaceans. Ovoviviparous, with 8 to 22 young in a litter. Size at birth about 20 to 21 cm. Utilized for human consumption.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHemitriakis japanicaFamilyTriakidae (Houndsharks)OrderCarcharhiniformes (Ground sharks)ClassElasmobranchii (Sharks and Rays)Maximum length110EnvironmentMarine; demersalClimateSubtropicalDistributionNorthwest Pacific: China, Taiwan, Korea, and Japan. Nominal records from Ambon, Indonesia (unconfirmed and based on a specimen close to if not identical to Hemitriakis abdita) and New Caledonia.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: commercialResilienceVery Low, minimum population doubling time more than 14 years (Fec=8) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026