Climatological Researches on the Phenology in Japan. M. Nakahara. Faculty of Horticulture, Chiba University, Matsudo, Japan. Tech. Bull. Fac. Hort. Chiba Univ., No.17: 89-113, 1969. Present paper is one part of a sevies of phenological stadies in Japan by the Author Phenological season and advance pattern of isophenes connected with the geographical advance in Japan were reported. Data used in this paper were based on recent printed matter of the Japanese Meteorological Agency published in 1966. Linear equation was used for computation of variation rate of isophenes both plants and animals. Values of constants in the mathematical expression were calculated and their results were given in the variation rate in the equation was compared to that of low temperature by five ℃. Present paper clarified the first Occurrence date of every season and adlvance pattern of isophanes as well as their variation rate in Japan.

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