Tokyo Metropolitan Police held an anti-terrorism drill on May 15.

The drill took place at Roppongi Hills, an integrated property located in the heart of Tokyo.

It was under the scenario that a knife-wielding man entered the establishment.

Security guards notified the police.

Police officers rushed to the scene and subdued the intruder.

Under a separate scenario, a toxic gas leaked from a bottle that was abandoned outside.

A special police unit picked up the bottle and decontaminated the surrounding area.

Police said that Roppongi could be exposed to terrorism risk due to its location.

It said that it aims to make a city that has resilience against terrorism.