A major commercial complex in Tokyo opened its doors to hypothetical disaster victims Friday to test its staff's ability to handle a citywide emergency.

The exercise took place at Mori Building Co.'s new Toranomon Hills complex, where commuters might seek shelter and sustenance in the event they are unable to get home because the transport network has collapsed.

Conducted a day before the 20th anniversary of the Great Hanshin Earthquake, it was the first drill of its kind held at the swanky office and shopping complex since it opened in June. The building can accommodate up to 3,600 people with food, air mattresses and thermal blankets in its conference rooms and shopping mall.