This article discusses the safety of tap water in Japan. It is generally considered safe, as the Japanese government has strict regulations in place to ensure that it meets the standards for potable water set by the World Health Organization. There are both pros and cons to drinking tap water in Japan, but precautions such as boiling or filtering can help reduce any potential risk of contamination. The most common contaminants found in Japanese tap waters are chlorine compounds, heavy metals, organic matter and bacteria. There are also health benefits associated with drinking clean and filtered tap water.