Nyuzen jumbo watermelon

Nyuzen Town sits in northeastern Toyama, where the Kurobe River has formed a broad alluvial fan. Much of the soil is sandy and shallow, with low water retention, and many local rice fields can be used as watermelon fields. Those conditions matter because the fruit needs a long growing period to become heavy and large, while watermelon is vulnerable to excess moisture. The place behind Nyuzen Jumbo Watermelon is therefore concrete: drained fan soil, abundant spring water, and fields that can move between rice and melon cultivation.

The fruit is known for a rugby-ball-like oval shape, a dark rind, and clear stripes. Typical weights are described at about 17 to 19 kilograms, with local descriptions also using about 18 kilograms; ordinary large watermelons are cited at about 7 to 9 kilograms. Size does not replace eating quality: the flesh is red and juicy, with a sweet aroma, crisp texture, and a clean sweetness that spreads in the mouth.

Growers leave at least 60 centimeters between plants so the fruit has room to enlarge. Each plant is thinned to two fruit or fewer, concentrating nutrients in a small number of watermelons instead of many. The crop is grown on its own roots and uses the Nyuzen Jumbo variety or a variety with equivalent traits, a set of choices tied to the long oval form, large size, and refreshing taste.

As the fruit grows heavier, rice straw is used as shade to prevent sunburn on the rind. A field that has carried the crop is then rested for at least six years to reduce problems from repeated cultivation. Tradition here is practical work in the field: straw placed over the fruit, a long rest for the soil, and thinning that leaves only a few melons to receive the plant’s strength.

The watermelon’s weight also shapes how it is handled after harvest. San-dawara, a woven rice-straw pad, is tied above and below the long oval fruit to protect it from damage. The straw is more than a surface look: it is a local material fitted to a heavy crop, and it helps explain why the watermelon has become recognizable at summer events and in ochugen gift customs.

Large watermelon cultivation in the Kurobe River fan area reaches back to around 1887, and production in Nyuzen began around 1897. In 1909 the fruit came to be called Kurobe Suika, after the Kurobe River; in 1971 a local producer association was formed, and in 1982 the group name changed with the move toward Nyuzen Jumbo Suika. Production under the current name began around 1983. The later geographical indication adds context for the production area, method, and weight boundary, while the lived continuity remains in the town’s fields and producer community.

The harvest season falls from July into August, placing Nyuzen Jumbo Watermelon in the middle of Toyama’s summer. It appears in local festivals and events, and its size and straw-wrapped presence suit ochugen gift customs. At the table, the important detail is still the cut fruit: red flesh, plenty of juice, crisp bite, and a refreshing sweetness held inside a melon that may weigh several times more than an ordinary large watermelon.