Is there a corresponding message from the ship station addressed to Vladivostock...?
You have an ID for the ship station - what is it's present position ie Sea of Japan / East China Sea area.... on 2 MHz it is likely to be fairly close to the coast station?
You can enter the MMSI of the ship into marinetraffic.com...
If its in that area, and assuming the rest of the MMSI is correct, the only other RSE station in the East is 002734421 Vanino Radio.
As Peter says, there are lots of errors (and assumptions)!
All good stuff - I like to investigate...even if it comes to nothing
Best Regards & Good DX