The ports of Taichung, Hualien and Suao are only visited by cargo ships. Weekly international passenger ferries run between the Taiwanese Keelung and Kaohsiung ports and Naha, the capital of the southern Japanese-island of Okinawa. The overnight ferry, which takes from 16 to 20 hours to reach Keelung, departs from Okinawa on Thursday or Friday. Star Cruises' Gemini is the most reliable (tel: + 81 (03) 6403 5188 in Japan or (02) 2731 0808 in Taiwan; website: www.starcruises.com.tw). There are also sea links between Kaosiung and Maca.