Mr. Koiwai is my best friend.

The Thames is one of the most famous rivers in the UK.

The Tigris is one of the important rivers in Asia.

He traveled around the world in search of the elixir of life.

Every morning, I sprinkle water on the flowers in my garden.

Every morning, I sprinkle water in the garden.

The water pipe is broken and water is leaking.

This river becomes brackish water where it mixes with the sea.

We should strive to protect water resources.

This skin toner is indispensable in my skincare routine.