Chiba Peanuts: Japan's Peanut-Growing Heartland

Chiba, particularly the area around Yachimata, grows the large majority of Japan's domestically produced peanuts, favored by the region's well-drained, sandy loam soil. Cultivation took hold here in the late 19th century and has stayed a significant local crop ever since, with harvest generally running through autumn, roughly September into November — worth checking current timing if visiting during that window, since weather shifts the exact dates year to year.

Freshly harvested, unroasted raw peanuts are sometimes boiled in their shells with salted water, a preparation almost unique to peanut-growing regions and quite different from the dry-roasted peanuts sold nationwide. Roasted-in-shell peanuts are the more common everyday snack, and Chiba peanuts also turn up processed into peanut miso, peanut-flavored sweets, and savory peanut sauces used as a dip or dressing — a distinctly regional use of the ingredient beyond the plain roasted nut.