Sasanishiki BL, a multiline variety of Sasanishiki for blast resistance was developed at Miyagi Prefectural Furukawa Agricultural Experiment Station in Japan. Sasanishiki BL is composed of 7 isogenic lines, Sasanishiki BL1 to BL7 with different resistance genes to blast disease. Sasanishiki BL was released to Miyagi Prefecture in 1994. The main characteristics of each component line are almost the same as those of Sasanishiki except for the resistance gene to blast disease. Sasanishiki BL has been cultivated in farmers' fields without rice blast damage since the released year.