A mutation of Nijisseiki resistant to black spot disease. Developed at the Inst. of Radiation Breeding at the National Inst. of Agrobiological Resources, Ohmiya-machi, Ibaraki, Japan, from gammairradiated buds of Nijisseiki. Registered as Pear Norin 15; named and released in 1991 by T. Sanada, K Kotubuki, T. Nishida, H. Fujita, and F. Ikeda. Similar in habit, flowering season, and fruit characteristics to Nijisseiki, except fruit ripens a few days later and tree is resistant to the Japanese pear pathotype of Alternaria alternata; not as resistant as Chojuro. Origin: Tree: Fruit:
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