A ninja museum in Japan, however, was robbed in three minutes flat recently.

Working at ninja speeds, the thieves stole a 150kg safe containing at least 1 million yen from the Iga-Ryu museum.

According to a report in Mothership Singapore quoting SoraNews, the team of robbers drove up in a car, one person got out and shifted the CCTV camera angle, and the other thieves forced open the door and stole the safe.

The museum is dedicated to the ninja tradition and features all things ninja.

Perhaps the robbery itself was done by ninjas?