Sika deer lupus hodophilax"), over a century ago. Without its main enemy, the population of sika exploded and it is now overpopulated in many areas, posing a threat to both forests and farmlands. Efforts are now being made to control its population instead of conserving it. None of its subspecies is endangered except the Kerama deer ("C. n. keramae") in the tiny Kerama Islands. In 2015, Japanese Ministry of the Environment estimated the population at 3,080,000 in Japan, including Hokkaido. China used to have the largest population of sika, but thousands of years of hunting and habitat loss have reduced the population
Sika AG Sika AG Sika AG is a specialty chemical company for building and motor vehicle supplies, headquartered in Baar, Switzerland. It has a leading market position in both the building sector and the automotive industry. Business activities focus on the seven target markets. Sika was founded in 1910 when Kaspar Winkler laid the cornerstone for the firm. Winkler worked himself up from poverty to become a successful entrepreneur, and by the 1920s he was already engaged in founding subsidiaries abroad. Today the company has more than 17,000 employees, subsidiaries in 98 countries, and an annual sales turnover of CHF 5.75 billion