Kumamoto to Seoul (KMJ–ICN) — Airlines, Schedules & Connections

Japanese passport holders enter South Korea visa-free for up to 90 days. No fee, no advance registration. Passport must be valid for the duration of stay. K-ETA (Korea Electronic Travel Authorization) was required from 2021 to 2023 but has been suspended for Japanese nationals through the end of 2025. If K-ETA resumes, it costs KRW 10,000 (about JPY 1,100) and takes 24 to 72 hours to process at k-eta.go.kr.

Entry is fast. Immigration at Incheon (ICN) typically takes 15 to 30 minutes with automated gates available for repeat visitors who register biometrics. You need a return or onward ticket and may be asked about accommodation. No proof of funds is routinely requested for Japanese passport holders. The 90-day stay cannot be extended for tourism purposes.

Direct flights from Tokyo Narita and Haneda to Seoul Incheon run about 2 hours 30 minutes, with dozens of daily frequencies on ANA, JAL, Korean Air, Asiana, Peach, T'way, Jin Air, and Jeju Air. Osaka Kansai, Nagoya Centrair, and Fukuoka also have heavy direct service. South Korea uses the Korean won (KRW), trading at roughly 9.5 KRW per JPY. T-money transit cards cost KRW 4,000 at any convenience store and work on all Seoul buses, subway, and taxis. No vaccination requirements.

AREX Direct Train to Seoul Station (43 min, ₩11,000) is a reserved-seat express. The All-Stop train serves Hongik University, City Hall, and other inner-city stations (66 min, ₩4,550). T2 passengers board at a dedicated T2 stop before T1; don't exit early. City Check-in at Seoul Station allows bag drop and boarding pass printing before the train for select airlines.Limousine buses serve major hotel zones and neighborhoods (₩16,000–18,000). Taxis from ICN to central Seoul cost ₩65,000–90,000; use only official orange (general) or black (deluxe) cabs from the designated stands. KakaoTaxi (ride-hail) operates from the airport.

Humid continental climate. Winters are cold and dry (−8 to 2°C, December–February) with occasional snow and wind chill. ICN handles snow well, though heavy falls delay operations. Summer monsoon (Changma) runs late June through July with heavy continuous rain. Typhoons can affect operations August–September with short notice.

Spring brings Yellow Dust (hwangsa) from China. Fine particulate storms reduce visibility and occasionally disrupt flights in March–April. Autumn (October–November) is the best flying season: clear skies, low humidity, 8–18°C. Pack layers for spring and fall. Summer is hot and humid (25–32°C).