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 Manu ended Tonga's hopes of a knock-out round spot). On 2 May 2015, Manu captained Tonga in their 2015 Polynesian Cup test-match against Pacific rivals Samoa. On 17 October 2015 Manu captained Tonga again this time in their Asia-Pacific Qualifier match against the Cook Islands for the 2017 Rugby League World Cup. On 7 May 2016, Manu traveled down from Hull to Sydney to captain Tonga in the 2016 Polynesian Cup against Samoa, where he started in the second row in the 18-6 loss at Parramatta Stadium. In 2018 he announced his retirement from international rugby league. Sika Manu Viliami Sikalamu