Marine debris is a growing issue for wildlife and at least 267 species are affected world widely. Sea turtles ingested plastic debris likely due to mis-recognition with their preys. Appearance characteristics of plastic debris have been studied intensively. However, in this study, other influencing factors that would affect debris ingestion in sea turtles were investigated through tank experiments (Otsuchi, Iwate Prefecture and Kuroshima, Okinawa Prefecture). Transparent plastic sheets (clean and fouled) were indicated solely and randomly to green turtles (6 raised and 13 wild individuals) and biting behaviour was counted. Meanwhile, both clean and fouled debris were provided together into the tank and preference was examined according to detailed behaviour. Green turtles preferred fouled debris (17/19 experiments) than clean debris, which imply that other than visual cues, other senses may be utilized such as olfactory chemoreception. In addition, the notably higher debris biting ratio (63/95) seen in raised individuals comparing to wild turtles (15/40) suggested that life experience may play a role behind debris ingestion. Furthermore, wild transients population (Otsuchi individuals) showed comparatively lower debris biting ratio (9/126) than that of residents counterpart (Kuroshima, 15/40) indicated that life status (foraging strategy and habits) might be the reasons for such differences.