Industrial parks in northern Bangkok were the worst affected in the 2011 flooding. Fig. 1 shows the
major industrial parks around Bangkok. The flood deluged the Saha Rattana Nakhon Industrial Park,
located in the northern part of Ayutthaya Province, on October 4, 2011. It also destroyed Rojana Park,
home to a large number of Japanese affiliates. In total, seven major industrial parks were flooded. In
addition, some firms—including Japanese affiliates—located outside these industrial parks were
flooded. According to JETRO Bangkok’s investigation, over 550 Japanese affiliates suffered direct damage
from the flooding. These affiliates saw that the ground floors of their factories were waterlogged
for up to two months. Consequently, production facilities such as capital goods and buildings were
seriously damaged.