Five years old samples of the clone seedlings of Cryptomeria japonica naturally regenerating in Mt. Sambe, planted in mono-planting and mixed-planting plot, were cut and surveyed. The weight of stems(ω_s), the weight of branches and leaves(ω_<B+L>), the length of branches(L_B), the inclination angle of branches(IA_B), and the number of branches(N_B) were measured and the values of (ω_<B+L>)/(ω_s) and (N_B)/H were calculated.
1. The values mentioned above are hereditarily different among clones.
2. The clones which have high values in ω_s have also high values in H,D_0, ω_<B＋L> and L_B.
3. The length of branches has greater effect on the weight of branches and leaves than the number of branches and the inclination angles have.
4. The correlation of each characters mentioned above between monoplanting and mixed planting plot are significant in 5% level.
5. The rank correlation of ω_s is not significant and those of L_B and IA_B are significant in lower significance level. This means that each characters differently response to environmental factors.