海洛因

The Yakuza has two investments in Thailand. One is a factory polluting the environment in Pattaya. The other is smuggling heroin with Thai partners from Burma. It is transported to Pattaya by placing it inside blocks of ice. Once there it is removed and surgically implanted into the "boobs" of transvestites for onward transportation by air to Japan. Unfortunately for them, the Thai police know all about their operations.