This paper deals with the development of crown morphology (length, diameter, slenderness ratio and form) in accordance with tree height as an indicator of the growing stage. Crown measurements were taken for 24 stands of Cryptomeria japonica (Yabukuguri) in Oita district, which were also used in the author's previous report in this journal. The investigations distinguished between the part exposed to sunlight and the shaded part, and showed that there were three stages according to the trends of length, diameter and slenderness ratio. In the first stage, the whole crown consisted only of the part exposed to sunlight and all of these three factors increased markedly. In the next stage, the length and slenderness ratio of the part exposed to sunlight and the crown diameter temporarily decreased slightly, while the length and slenderness ratio of the total crown increased because of the rapid growth of the shaded part. In the last stage, the slenderness ratios of both parts of the crown remained almost unaltered in spite of the linear gradual increase of the length and diameter. Through these stages the form of the part of crown exposed to sunlight continued to swell out from the conical shape at planting.