Strictly speaking, "pesticides" are defined as substances that "protect crops" and that "are sprayed for symptom improvement." Pesticides have the effect of eliminating things that are harmful to crops, such as pests, diseases, and competing weeds, and help crop growth (such as plant hormones). They are also substances that are "registered as pesticides.”
Being "pesticide-free" doesn't necessarily mean produce is safe. Pesticides also have positive attributes. Depending on plant growth conditions and the environment, a minimal amount of pesticides may be used to prevent pests and diseases. The amount and types of pesticides vary depending on the producer.
At Farmers Marche, we handle products from producers for which we can absolutely verify where and how they were grown. Prior to shipment, a third-party organization verifies whether pesticide levels used to cultivate a given type of produce exceeds the standard set by the Japanese government. Unlike products that producers ship to the market, which use a level of pesticides that falls just short of the standard, there are hardly any producers who use pesticides during the winter season, since there is minimal pest damage.