Seoul: Passenger traffic on Jeju Air Co.'s Japan routes exceeded 4 million in 2025, mainly driven by a weak yen, the company said Monday. The number of passengers on the South Korean budget carrier's Japan routes reached a record high of 4,027,000 last year, up 4.8 percent from 3,842,000 the previous year, Jeju Air said in a press release.

According to Yonhap News Agency, the increase was buoyed by the weak yen, an increased supply of flights, and a growing preference for short-distance trips. The Incheon-Narita service carried the most passengers at 601,000, followed by Incheon-Osaka with 574,000 and Incheon-Fukuoka with 522,000.

Foreign passengers, including Japanese nationals, accounted for 32.6 percent of the total passenger traffic last year. Jeju Air, the country's largest low-cost carrier, currently operates six domestic routes and 62 international routes using a fleet of 43 aircraft. Of these, 17 routes serve major Japanese cities.