Kukai learnt not only the Buddhism but also a new civil engineering technology in China.
People of sanuki of Kukai's hometown asked him for the repair of the mannoike pond.
The MANNOIKE pond was a big reservoir for the water used in the field. Because the bank on the pond broke at each heavy rain and water overflowed, people in the foot were embarrassed.
A lot of people gathered in Kukai, and big construction started.
Kukai made the shape of the bank an arch type and distributed the power of water. He made the road where the water that overflowed from the embankment was poured on the outside. At that time, it was the newest method.
Many people gathered because there were a lot of people who wanted to work for Kukai.
This big construction was completed at a short period of only three months.
The Manno pond is used as a reservoir of the biggest agricultural water in Japan now.
Moreover, Kukai made the repair of the OWADANOTOMARI port that had become it in a present Kobe port succeed.