The Mizunomori Water Botanical Garden (草津市立水生植物公園みずの森, Kusatsu Shiritsu Suiseishokubutsu Kōen Mizunomori), also known as the Kusatsu Aquatic Botanical Garden, is a botanical garden specializing in aquatic plants and best known for its extensive lotus display.

Mizu-no-mori means "water forest" in Japanese.

It is located on Lake Biwa's southeastern shore on the Karasuma Peninsula in Oroshimo-cho, Kusatsu, Shiga, Japan, and open daily except Mondays.

An admission fee is charged.

This article related to a garden in Japan is a stub.