While looking into earthquakes and tsunamis for work (fun fun), ran across this publication -"The Orphan Tsunami of 1700" - in a local geographhical newsletter:http://pubs.usgs.gov/pp/pp1707/pp1707.pdf
What makes this absolutely fun for this community is part 2 talks about the evidence for demonstrating a massive earthquake in the NW US region using Japanese records at that time. Among the lovely things included are a map of the world from Japan's perspective and stories from six different Japanese accounts.
This scholarly work is a copublication between American and Japanese authors and is free to download. Enjoy :)