This study was conducted to investigate the temperature and accumulated temperature of Lentinula edodes strains from primordial occurrence to fruit body maturity. The experimental strains were Sanjo 108 (high temperature type), Sanjo 302 (middle temperature type) and Sanjo 502 (low temperature type). When the Sanjo 108 and Sanjo 302 occurred, the daily mean temperature inside the L. edodes inoculated logs was 17.9 ~ 20.5 °C, which was lower than air temperature by 0.7 ~ 1.15 °C. When the Sanjo 502 occurred, the daily mean temperature inside the L. edodes inoculated logs was 3.6 ~ 16.6 °C, which was lower than air temperature by 0.1 ~ 0.7 °C. The difference between the maximum and the minimum temperature when the fruit body occurred was 4.4 °C inside the inoculated logs and 6.9 °C in the air temperature in Sanjo 108 and Sanjo 302, and in Sanjo 502 was 5.5 °C inside the inoculated logs and 9.1 °C in the air temperature. The number of days from primordial occurrence to fruit body maturity in Sanjo 108, Sanjo 302 and Sanjo 502 was 3.9 days, 5.1 days and 10.6 days, and accumulated temperatures of these strains were 104.9 °C, 129.2 °C and 141.4 °C, respectively. The number of days and accumulation temperatures were 518 days and 8,361 °C in Sanjo 108, 444 days and 6,475 °C in Sanjo 302, and 560 days 9,263 °C in Sanjo 502.