Activists have for many years participated in actions around harbours all around Japan. They collect and test wild-growing canola along roads and near food oil factories. The import of Genetically Modified canola, which started in the late 1990s, led to GM plants growing wild, an unintentional effect that poses a risk to the biodiversity of similar plants. Canola is a member of the Brassica genus and many other edible plants are grown in Japan, thus increasing the risk that cross-contamination will occur of related foods like cabbage or broccoli.
In 2006, the government started taking an interest in this issue, after intense lobbying by CUJ and the No! GMO Campaign, who are helping to organise the testing. The Ministry of Agriculture, Food and Fisheries (MAFF) has again this year announced that they have found GM canola growing wild around seven harbours (Tomakomai, Kashima, Chiba, Nagoya, Yokkaichi, Kobe and Hakata). They also found wild-growing GM soy at one harbour (Hakata).
It is believed that the imported seeds easily fall off conveyor belts and lorries as they are transported from the ships that enter the harbours. According to Bio Journal, when 165 individual seeds of Brassica napus were tested, 20 were discovered to have resistance to both glyphosate and glufosinate.