Because there are many rivers in Tokyo. I think the water transport system used on the river and the river Neiva kava master a major price Wah as sueng minimize traffic on land, and also long-distance public transport.
Because rivers in Tokyo, so I think that bringing transport system used in the river's name, Kauai and the price that it is important to reduce the Shared traffic. And can also transport long distance, too.
Because in Tokyo rivers. I thought of water transport in the use of the river and master เนคาวา River ara Kawa is a important thing that helps reduce traffic congestion, land. And also can transit distance.