This paper is the results of age-determination and growth on Sea Bream, Chrysophrys major Temminck et Schlegel, in the coastal waters off Northern Kyushu region. During the period from July 1958 to May 1960, 368 specimens were sampled at Fukuoka fish market. The use of scales for the age-determination has been critically examined with point of facility on measurement and of validity of age-marks. Scales around the lateral fin were used for age-determination, since they are higher in the rate of mark-formation and larger than other portion's scales in the diameter. The relationship between fork-length (L) and scale-size (R) is given by the following equation : L=2.34R^2+9.33R+49.1 Measurements of mark-size are standardized by multipling with facter, R/R. The representative values of mark-size groups were obtained from relationship between scales-size and mark-size by mark-groups monthly. Standard mark-size was obtained from them. As the standard mark-size was examined by Walford's graphic methed, the following equation was obtained r_n+1=0.740r_n+3.58 The period of the mark-formation is from April to June, the peak of the period being in May. The 'spawning season of Sea Bream is from March to May, the peak of the season being in April. Thus, putting t=0 at the peak of spawning season, April, both growth of length and weight are given as L= 803 (1- e^-0.186t+0.055) W=11495(1-e^-0.186t+0.055)^3 The relationship of the bedy weight to the fork-length is given as follows : W=2.22.10^-2? L^3 Comparing with the results of growth of Sea Bream reported by Ebina, Wang, Kawase and Akazaki, the length at each age differs among the results attained by the author, but the rate of growth obtained by Walford's plots is similar in value. Therefore the rate of growth of Sea Bream is constant at all region, while the growth is determined by first age growth.