Akio Kashiwagi (柏木昭男, Kashiwagi Akio), also known as "The Warrior", was a Japanese businessman and gambler who was known for his extravagant lifestyle and alleged connections to organized crime. In the early 1990s, Kashiwagi gained international notoriety for his high-stakes gambling at casinos in the United States and Australia. He was involved in several publicized incidents, including a dispute with then businessman Donald Trump and with other casinos over his gambling debts. In 1992, Kashiwagi was murdered in his home in Japan. The culprit was never found.
Source: “Akio Kashiwagi”, English Wikipedia (CC BY-SA 4.0), excerpt