[[https://www.mhlw.go.jp/english/policy/health/water_supply/dl/4a.pdf|Japan water quality standard]]	

[[https://matcha-jp.com/en/1410|Facts On Japan's Drinkable Tap Water]]
 		 	
[[https://www.who.int/water_sanitation_health/dwq/chemicals/tds.pdf|Total dissolved solids in Drinking-water]]	 
 	

[[https://www.healthfitnessrevolution.com/why-the-hunza-live-longer-than-the-rest-of-the-world/|Why The Hunza Lifespan Is So Long]]

[[https://www.trafalgar.com/real-word/lifespans-japanese-secrets-living-longer/|Japan holds the secret to living longer, and they can prove it]]

[[https://www.aetnainternational.com/en/about-us/explore/living-abroad/culture-lifestyle/the-real-secrets-behind-japans-high-life-expectancy.html|
The secrets of Japan's high life expectancy
]]

[[https://www.researchgate.net/publication/287640765_An_Assessment_of_Physio-chemical_and_Microbiological_Parameters_of_water_from_Hunza_and_Gilgit_River_Gilgit-_Baltistan_Pakistan|An Assessment of Physio-chemical and Microbiological Parameters of water from Hunza and Gilgit River Gilgit- Baltistan Pakistan]]