The latter half of the planning design process for Japanese-type rotary blade is discussed, based on results of research on individual design elements. Drawings at each stage are shown in Fig. 7. The design of the scoop-surface is critically important for the blade to perform effective cutting, throwing and mixing of soil. The practical process derived from theoretical research on the scoop-surface is explained, with a flow chart of Fig. 10. The design of straight (length­wise) blade is also important in terms of its influence upon cutting resistance.
　After finishing the planning design, the drawing of the production model has to be done with indicated dimensions for production purpose, and also the notice for material, heat treatment including hardness, marking, surface finishing, part and type number, etc.