Final answer:
Japan's severe pollution is due to rapid industrialization, lax pollution regulations, and high population density.
Step-by-step explanation:
The sever pollution in Japan can be attributed to rapid industrialization, lax pollution regulations, and high population density. However, it is important to note that the question asks for the option that is not a cause of the pollution. Therefore, the correct answer would be none of the above.
The rapid industrialization, lax pollution regulations, and high population density all contribute to Japan's severe pollution problem.