A named selection of Natsudaidai developed in Japan and best known today through its widespread marketing under the name Amanatsu. An early-maturing cultivar that contains only 1-2% acid was found and named Kawano Natsudaidai (this selection) in 1950. Tree has large leaves. Fruit has a necked pummelo-like shape; medium to golden orange yellow; rind thick, pebbly, prominent glands; juice vesicles coarse but tender; 8 to 10 seeds; flesh juicy, light orange, sweet, but with an aftertaste.