[ABSTRACT] Since 1982, thousands of groundwater pollution cases have been found in Japan. In order to improve the groundwater quality, Japan has developed strategies for protection of groundwater. In this paper, authors try to explain the present of groundwater use, groundwater pollution and remediation methods in Japan. From the results shown in this paper, it can be found that groundwater pollution problem has become very serious in Japan. Even many efforts have been made to improve the situation in past 15 years, there is still a long way to go to reach the goal since the characteristics of subsurface water movement and limitations of remediation technologies. Finally, groundwater pollution situation in Tokyo was discussed in more detailed.
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