Chiyoda Seisakusho in Kagawa Prefecture is exhibiting some of Japan's waste-not spirit (mottainai!) by using leftover udon scraps to make electricity. Noodle power! But is this technique really as eco-friendly as it sounds?

Chiyoda was already making bio-ethanol out of scrapped udon, but there are dregs left over. The power plant project began from trying to think of a way to put those dregs to use. By fermenting them, plus uneaten udon collected from restaurants (1.5 tons, 1 ton respectively per day), methane gas is created, which can rotate a turbine. Chiyoda estimates it'll be able to produce enough kilowatts to power 50 households in a year and that it'll start selling power to Shikoku Electric Power Company as early as September. Additionally, since it got a waste disposal license, it can make extra money just by collecting the udon shop garbage.

All told, Chiyoda expects to make ¥12 million (about $124,572) per year. This, from an initial investment (at least, for the plant) of ¥80 million (about $830,480). If others are keen on replicating this feat, the company is also planning on taking orders for plants themselves beginning sometime this year.