But before that happens they want to see GM crops commercialized for non-food applications like biofuels. Since genetically modified rice can yield more grain per acre it would be preferred as a fuel feedstock. However even with that it would be unlikely that there would not be enough acreage to really make domestic biofuel a viable alternative in Japan. One of the other concerns with modified plants is that when grown in the open they can cross-pollinate with conventional versions, contaminating those as well.
[Source: The Asahi Shimbun]