Most of the historic buildings and houses which are National Treasures and Important Cultural Properties in Japan are made of hinoki or sugi. The woods are straight-grained and comparatively soft, so that they can be worked with adze, axe, wedge, and spear-shaped plane. As restorations were completed on the Hohryuhji Temple (1192-1333, end of the 16th century, and in the 17th century), hinoki was replaced by keyaki, by matsu and sugi, and by toga respectively. The Isejinghu Shrine has been reconstructed with new hinoki every 20 years, timbers being available from a government managed forest of stands 200 to 500 years old. Since the 1920's, sugi has been a popular roofing material. Data from tests on hinoki are reported. See also AATA 22-201 for reference to book.