【Terraced Rice Fields】
Japan is an extremely mountainous archipelago, two-thirds of which is covered in steeply rising peaks. Tōkamachi is tucked into a basin north of the Echigo Mountains, a region of rising hills with little in the way of flat, arable land. Wet-field rice farming, which has been the dominant agricultural pursuit in Japan for over two millennia, requires level ground in order to maintain a uniform water level when the fields are flooded. In order to grow rice, the residents of Tōkamachi have turned their gently sloping hills into terraced paddies.
Rice fields are normally irrigated by diverting a river, but rivers form in the valleys between mountains, not on their slopes. Instead, terraced rice fields must be created downhill from a natural water source, like a spring or pond—or, in the case of many of the Tōkamachi’s paddies, a beech grove. The roots of beech trees grow thickly and deeply, and their fallen leaves provide food for the microorganisms that live in the ground. Together, these traits create rich, dense soil around the trees that collects and holds rainwater and snowmelt, providing a natural water source.
Terraced rice fields have been a classic image within Japanese culture since at least the Edo period (1603–1867), when they were depicted in woodblock prints. The famous tagoto no tsuki motif shows the moon reflected in each of the flooded paddies of an empty rice field, a scene that many modern photographers labor to capture.