Although the expected height of the tsunami is only 1 meter (about 3.3 feet), the waves ... Earthquakes typically occur in the Nankai Trough every 100 to 150 years, according to the JMA.

Economic damage could total up to 220 trillion yen ($1.50 trillion ... The most recent Nankai Trough quake happened in 1946 when a magnitude 8 tremor and 6.9-metre (22.6-ft) tsunami waves ...