As a papercraft, this Chuuchu Kanri-kun is really just a cube, but what it does as a "Centralized Management Hole" to make it easier to wash sediment from the rural drainage pipe system from rice paddies to prevent them from getting blocked is really smart!
Download + build your own free papercraft Chuuchu Kanri-kun centralized drainage hole (from Hokkaido Rural Development Bureau):
(download instructions: click the two "(PDF ...KB)" links just below the papercraft picture near the bottom on Hokkaido Rural Development Bureau's website)
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