The strongest earthquake that ever struck Japan was on March 11, 2011. This 9.0 magnitude quake triggered a 33 feet/ 10 meter Tsunami which caused massive destruction in the north-eastern part of Japan.
The deadliest earthquake is the 1923 Great Kanto- earthquake. It struck the Kanto- plain on the Japanese main island of Honshu- on September 1, 1923. Varied accounts hold that the duration of the earthquake was between 4 and 10 minutes. The Kanto- quake killed between 100,000 and 140,000 people. The quake had a magnitude of 7.9 on the Richter scale.