Contact the Consulate using the following number +82-64-742-9500 or try going to the institution yourself at 977-1 Nohyong dong, Jeju-shi, Jeju-do, Republic of Korea. You can also apply for the Japanese e-Visa online following a quick and intuitive 3-step application process that requires no visits to the Embassy.
Visa to JapanJapan Electronic Travel Authorization