Regarding soft and hard water
There are soft water and hard water.
The hardness of water used in different regions of the world varies, but soft water is suitable for Japanese tea.
Soft water softens the astringency, enhances the aroma, and creates a rich taste.
If you use hard water, the water color of the tea becomes whitish and the taste becomes bland.
Japan has soft water, but there are many places with hard water in Europe and America.
Please use soft water to bring out the charm of Japanese tea.