Studies on the Selection of Combination of Root Stocks with Scions of Non-astringent Persimmon (Diospyros) Varieties Studies on Reproductive Law and Precocity and Prolificacy of Non-astringent Persimmon A Study on Chemical Compositions of Astringent and Non-astringent Type Fruits of Persimmons Studies on the Biological Characteristics and Control Method of Hypocala subsatura Guenee The Changes of Tannin and Sugars in Non-astringent Type Fruits of Japanese Persimmon during the Development of Fruit