In the fiscal year 2023, *** confirmed cases of groundwater contamination were reported in Japan. The majority of those cases were concerning the exceeding level of nitrate nitrogen and nitrite nitrogen.
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MOE (Japan). (March 31, 2025). Number of groundwater contamination cases in Japan from fiscal year 2014 to 2023 [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 01, 2026, from /statistics/699574/japan-number-of-groundwater-contamination-cases/
MOE (Japan). "Number of groundwater contamination cases in Japan from fiscal year 2014 to 2023." Chart. March 31, 2025. ÌÇÐÄÆƽâ°æ. Accessed August 01, 2026. /statistics/699574/japan-number-of-groundwater-contamination-cases/
MOE (Japan). (2025). Number of groundwater contamination cases in Japan from fiscal year 2014 to 2023. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 01, 2026. /statistics/699574/japan-number-of-groundwater-contamination-cases/
MOE (Japan). "Number of Groundwater Contamination Cases in Japan from Fiscal Year 2014 to 2023." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 31 Mar 2025, /statistics/699574/japan-number-of-groundwater-contamination-cases/
MOE (Japan), Number of groundwater contamination cases in Japan from fiscal year 2014 to 2023 ÌÇÐÄÆƽâ°æ, /statistics/699574/japan-number-of-groundwater-contamination-cases/ (last visited August 01, 2026)
Number of groundwater contamination cases in Japan from fiscal year 2014 to 2023 [Graph], MOE (Japan), March 31, 2025. [Online]. Available: /statistics/699574/japan-number-of-groundwater-contamination-cases/
