1. Ishigaki Island Sea Turtle Research Group, Arakawa 2357-11, Ishigaki, Okinawa, 907-0024, Japan [okuyamajunichi@gmail.com; shougakubodom_7_7@docomo.ne.jp; ampalklaus@yahoo.co.jp; manjyuhi10de@gmail.com; aya.bindamania@gmail.com; bloodymoon_rise@yahoo.
2. Ishigaki Tropical Station, Seikai National Fisheries Research Institute, Ishigaki, Okinawa, 907-0451, Japan [turtlea@affrc.go.jp]
3. Graduate School of Informatics, Kyoto University, Yoshida-honmachi, Sakyo, Kyoto, 606-8501, Japan [nishiza@bre.soc.i.kyoto-u.ac.jp]