In Japan, Koshihikari suffers considerable lodging damage as a result of frequent powerful typhoons and, thus, the development of lodging-resistant cultivars has been a long-standing challenge. The first author transferred the semidwarf gene Jukkoku_sd1 to Koshihikari to develop a semidwarf form of Koshihikari which could withstand a typhoon by backcrossing with Koshihikari eight times , with more than 99.8% of the background of the Koshihikari genome, except for Jukkoku_sd1 . This cultivar, which was about 20 cm shorter than Koshihikari, was named Hikarishinseiki (rice cultivar number 12273) [33, 34]. Hikarishinseiki is the first cultivar to be a Koshihikari-type semidwarf with sd1 registered in Japan and USA [35, 36].