2.3. Target Area

The target areas were the cities of Konan and Aki and the village of Geisei, in the Shikoku region. These three areas are all located on the Pacific coast and are adjacent to each other (Figure 1). The population is about 32,000 in Konan, 3000 in Geisei, and 17,000 in Aki (Figure 2) [28].

Locations of the cities of Konan and Aki, and the village of Geisei in the Shikoku region of Japan. キロメートル: km.

Population distribution by region in Konan, Geisei, and Aki.

An earthquake along the Nankai Trough is expected to occur within the next 30 years, and tsunamis are predicted to occur along the Pacific coast as a result [29]. A 30-cm tsunami is expected to reach Aki first, within 5 min of the earthquake. It is expected to arrive in Geisei within 5 to 10 min and to reach Konan within 10 to 20 min [30].