Japan Transocean Air and Ryukyu Air Commuter operates daily flights from Naha to Kumejima Airport 30mins one way, JPN ï¿¥10,000. The New Kumeshima Ferry Line also runs twice daily from Naha's Tomarin Port to Kumejima's Kanegusuku Port departs 8:30am and 2:00pm, approximately 4 hours, ï¿¥5,000 roundtrip. During the summer months of July and August, Japan Transocean Air also operates once a day flights direct to and from Tokyo's Haneda Airport.