No, because it hasn’t been proven to go beyond the immediate locale.
There have been a number of reports of radiation landing in California, and I as a resident within 20 miles of the beach have been following it, yet the reports are unfounded and not demonstrated. And studies have show the heavy isotopes form the reactors actually sink to the bottom in a short distance.
Nothing has hit Hawaii, there are no reports of anything but trash reaching Alaska, or British Columbia, or Washington or Oregon.
So no, it’s not poisoning the world’s oceans.