The 300 million yen robbery (三億円事件 San Oku En Jiken?), also known as the 300 million yen affair or incident, was the single largest heist in Japanese history at the time. It occurred on the morning of December 10, 1968 in Tokyo, Japan. Adjusting for inflation, it would be valued at approximately US$9 million in 2011. As of 2012 it remains at approximately US$9 million.