http://www.npa.go.jp/hakusyo/h03/h030103.html "1991 Police White Paper Chapter 3 : Drug Criminal Organization"], 1991, National Police Agency This group had used a small island located in Kagoshima Prefecture as a smuggling base, and for example in 1986, this group smuggled approximately 570 kilograms of methamphetamines—estimated retail price of nearly US$1 billion—from Taiwan. [