Karakusa water gate into the courtyard

Quick answer：

Karakusa water gate into the courtyard is a Japanese expression that describes the concept of incorporating a natural water element, typically in the form of a small pond or stream, into the design of a traditional Japanese garden. This feature is often associated with Zen Buddhism and represents the serene and tranquil nature of the Zen philosophy. The term 'karakusa' refers to a pattern of waves or ripples found in traditional Japanese art and design, symbolizing water. 'In the courtyard' signifies the location within the garden where this water feature is placed.