Japan's biggest heist, the still-unsolved "300 million yen robbery", is carried out in Tokyo.

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 a robbery that occurred on December 10, 1968 in Tokyo, Japan. A man posing as a police officer on a motorcycle stopped bank employees transferring money and stole 294 million yen. It was the single largest heist in Japanese history at the time. Half a century later, the case remains unsolved.