well, tsunami's are caused by earthquakes and most earthquakes occur in the sea.
Japan
The most recent Tsunami to hit Japan was in March of 2011.
It's not likely for tsunami's to continue hitting Japan.
it was in INDIAN OCEAN it was a 9.3 earthquake.
Tsunami's happen most around the Pacific ocean because that's where the worlds tectonic plates are situated, so when one shifts, it often results in a Tsunami...
the last tsunami that recently happent was Thursday 29, 2010 in the west coast of Alaska.
what tsunami? i was in the tsunami in south east Asia (i was in phuket, Thailand) and it hit the coasts mostly! hopes that answers your question
japan
New Zealand
when there is a earthquake or landslide underwater
Yes. Most tsunamis are in the ocean. It is rare to see them in lakes.
The Earthquake occurred before the tsunami as it is what caused the tsunami.