I have a 35 square meter field in Tokyo next to farms that use pesticides and fertilizers. This is only my second year and my yield for various plants is small. I lose entire crops to various insects (not birds or animals). All the farmers around me insist I must use fertilizer and pesticide. Can anyone recommend natural pesticides and fertilizers that might be available in Japan? I heard Neem oil is effective as a pesticide for some plants. I grow: daikon radish, radishes, broccoli, various beans, onions, scallions, carrots, leafy vegetables, and several others seasonally. Any guidance would be appreciated.
Neem oil works great. I also use regular dish soap (about 5 ml soap per 750 ml water)-great for aphids and leaf borers. I recently started growing vegetables using hydroponics. Less work, fewer bugs, greater control and higher yields.
True organic pest control=insects that will control or eliminate your pests and leave your crops alone. No chemicals at all. There are several hydroponic companies that do business on the internet-not only do they sell fertilizers and pesticides, but they also sell beneficial insects. Here in the US, we have a federal agency that regulates agricultural products and imports. I don't know about Tokyo, but would imagine that you have something similar.
Robert Henry of the Survival Report brings you the first of a series of videos on starting out with fruit trees. He includes tips on buying the right types of trees for your area, how to care for them, irrigation solutions as well as information on diseases and treatments. 
Today I completed my home vegetable garden & showed the steps to reach the completion. This video was created for thisisnotadiet.org, a Health & Fitness Site that gives new meaning to what it means to be on a diet!