Jeju is southwest (or at best, due south) of the Korean peninsula, definitely not southeast.
At first I thought you were getting at Tsushima, or Kyushu, or maybe even Honshu, and was getting increasingly frustrated until I finally got Jeju just by spamming anything that might be in the general vicinity.
At first I thought you were getting at Tsushima, or Kyushu, or maybe even Honshu, and was getting increasingly frustrated until I finally got Jeju just by spamming anything that might be in the general vicinity.