The Meitetsu building, whose main tenant is the Meitetsu department store located in Nagoya, having Meitetsu Nagoya Station in its 1st and 2nd floor of underground, being connected in the 1st floor of underground to the south fare gate of the Higashiyama subway station, the Sun-road and Gate-walk shopping malls, and the underground fare gate of Kintetsu Nagoya Station, forms a pedestrian traffic network with these railway stations and shopping malls. Evacuation simulations of all visitors in the building starting to evacuate at the same time have been conducted. Evacuees are instructed to go to 4 outdoor designated areas via sidewalks of evacuation routes. It has been found that huge evacuee traffic on sidewalks causes crowd congestion which in turn generates evacuation delays from the department store. However, these delays are found to be reduced by 17% via minimizing crowd congestion levels on sidewalks.