10 December 1968: the “300 million yen robbery”

In Japan's most notorious – and ingenious – robbery, one man outwitted four guards and made off with a car containing ¥300m on this day in 1968.

Committing the daylight robbery of a huge amount of money often involves a very well-armed group of thieves. But not always. Sometimes all that is needed is a trusting group of guards and a great lie. That was the case with Japan's biggest robbery, when just under ¥300m (worth around US$820,000 in 1968) was stolen from a vehicle guarded by four security staff. The “300 million yen robbery” remains unsolved.

On 10 December 1968, four employees of the Kokubunji branch of the Nihon Shintaku Ginko Bank were transporting ¥300m in bonuses for Toshiba factory workers, when a motorcycle policeman stopped their car. The policeman approached, and informed the bank employees that their branch manager's home had been blown up. He added that the police had received a warning that dynamite had been placed under their vehicle. The four guards got out as the policeman went underneath the car to check for explosives. Soon after, the bank guards noticed smoke and flames from under the vehicle. The policeman rolled out, shouting that it was about to explode. As the panic-stricken guards ran away, the policeman got in and drove off, along with the money.

The investigation was vast. Some 170,000 policemen went through 110,000 suspect names using 780,000 montage pictures throughout Japan. But they did not find their robber. At the scene of the crime, 120 pieces of evidence were found, including the “police” motorcycle and the “smoke and flames”, which turned out to be an ordinary flare. Police later realised that some of the “evidence” was planted there ingeniously to confuse the investigation.

Subscribe to MoneyWeek

Subscribe to MoneyWeek today and get your first six magazine issues absolutely FREE

Get 6 issues free

Sign up to Money Morning

Don't miss the latest investment and personal finances news, market analysis, plus money-saving tips with our free twice-daily newsletter

Don't miss the latest investment and personal finances news, market analysis, plus money-saving tips with our free twice-daily newsletter

Sign up

After seven years, the investigation passed without an arrest and answered few questions. In 1988 the thief was relieved of any civil liabilities. This means that he is able to openly admit guilt without fear of arrest or prosecution. Nobody has yet to come forward.

MoneyWeek’s mission is to bring you news, analysis and information to help you make informed investment decisions as well as bring you the news that matters to your personal finances. From share tips, the latest on fund performances, and personal finances to what is happening in the economy – our team of award-winning journalists and experts will bring you the information that matters. Our content is always fair, and accurate and our editorial is always independent, meaning our writers are not influenced by advertisers in any way.