The time gap between spring and neap is approximately 7 days. The neap tides refers to a period of moderate tides when the sun and moon are at right angles to each other. The spring tides are high tides.
The Kanto Plain is the largest plain in Japan. It is in the Kanto Region of central Honshu. The plain covers an area of 17000 sq.km. Large number of plateaus form a part of this plain.