This is a somewhat crazy google thing (I am very sure who works at google has a lot of fun)
Open google maps
Right click on Tokyo in Japan choose "get directions from here" then
Right click on Seattle on the Westcoast of US (actually You should be able to click anywhere in the US I think) and choose "get directions to here"
Follow (in the left pane) the route - around suggestion 23 and 33 You will be entering the pacific ocean