A Japanese source is more poetic; it says
The typhoon number 3 was approaching
and the Sea Prince stopped unloading the crude oil
at the refinery of the port of Reisui
to take refuge outside the port of Resui.
It was drifted to Shori Island and was stranded.
Later a fire broke out in the engine room,
which was followed by an explosion
and the damage in the cargo tank.
As the result the fuel oil and the crude oil flowed out.
The spill oil arrived near the area 50 miles away
from the scene of the accident in seven days
after the accident,
which caused serious damage to the fishing industry.
This source calls this a 96000KL spill,
but the names are all wrong.
The ship was discharging at Yosu and went aground on Sori Island.
(do is the Korean suffix for island).
Other sources including ITOPF say 2000 to 5000T of bunkers.
USCG says 412,000G.
IOPCF says 5035 tons.
A few sources are as low as 700T.
Several sources say ship a VLCC had 83,000 tons still on board,
which jibes with an interrupted discharge;
but raises the question of why did we not have a cargo spill?
For now going with 5000T but we need a lot more info.