“…Because of the increase in the population of senior citizens in Japan and the increase in people's interest in their health, the amount of used test tubes will be much higher in the future. In Japan, recycling of medical waste is not a common practice, but there has been some research on medical waste management (Kagawa et al, 2006;Tamiya, 2004, Yamaguchi et al, 2002. Recycling of medical waste is gaining increasing popularity abroad, and it continues to attract the attention of researchers (Kushida, 2000;Bohlmann et al, 2005;Lee et al, 2002;Bartholomew et al, 2002).…”