I have to wonder...
Is everyone clear that tsunami, normal waves, and currents are very different phenomena?
The tsunami would propagate and dissipate within hours, reaching across the Pacific rather quickly. The effect was much smaller in Oregon State but similar to that in Miyagi Prefecture.
Normal waves really aren't of any interest in this thread and usually are significant only near shore, such as in surfing competitions.
Currents carried the debris over months around the Northern Pacific.