Mokkur Yuru-chara (mascot character) Kawachinagano City Osaka Kawachi Wood Ruler 15cm ruler Not for sale What is Osaka Kawachi Wood? It is timber produced by Kawachi Forestry. Its characteristics are straight grain and a cut surface that is close to a perfect circle. The width of the annual rings is consistent and even, and the slightly pink color is very beautiful. It is a strong, high-quality wood.