Ash is sometimes called the four major precious trees alongside walnut, oak and mahogany. It has a high specific gravity, and shows profundity, strong strength, and shock-resistant nature. It has been used widely in human life for a long time because of its high efficiency of woodworking and processability. It is still widely used in modern times such as building materials, construction materials, furniture, musical instruments, bat and other exercise equipment.
Until around the year 2000 in Japan’s houses, Ash was heavily used due to its strength and color. It is processed into a laminated wood for manufacturing commonly the treadboards and handrails of the stairs, and the top plate of the counter. Furthermore, in the era around 1960-80, it was a most popular tree type used as peeling material with straight grain, the material of which is used for finishing material of wall and ceiling with grooves at 75 mm regular interval. In recent years, the popularity of this material for flooring use is increasing, because of unique mixture of a slight bigger clear grain with knots that is the reason for attracting people.