Super Typhoon Hinnamnor has gradually moved northward to reach waters off the southern island of Jeju on Monday, the state weather agency said.
The typhoon is classified as a "very strong" typhoon packing a maximum sustained wind speed of 49 meters per second.
The Central Disaster and Safety Countermeasures Headquarters' emergency response posture was upgraded to the highest level as of 4:30 p.m. Sunday for the first time in five years.