Japanese angelshark is eaten and the rough skin is made into a type of leather called shagreen for use in wood finishing. Angel sharks in general are highly threatened by commercial trawl fisheries due to their susceptibility to capture and low rate of reproduction, and angel shark species elsewhere are known to have declined markedly under fishing pressure. Trawling activity in the Yellow Sea and other parts of the northwestern Pacific is intense and, coupled with pollution, has had a serious impact on the local ecosystem. The Japanese angelshark population is suspected to have declined by up to 50% or more under
Iranian leather industry encourages the industry to process high added value products of leather goods, leather shoes and leather clothing so as to increase the industry's profits". 170 leather companies are still active in Iran with the annual production of 4 million and 334 thousand square feet of leather annually. Most of the leather companies belong to the private sector, yet most these factories just work with 40% of their capacity despite the high investments in leather industry in the country. Despite the industry's long history and skin hide proficiency, Iranian products have not achieved a significant place in the international markets. Iranian