|  Also called tenjou aratameguchi 天井改口. Lit. 
roof structure inspecting entrance. A trapdoor built into a ceiling to enter the 
loft or attic to examine the underside of the roof framing and sheathing or to 
locate leaks. A fine trapdoor that is cleverly made to look like part of the ceiling 
can be found in the Shoin 書院 at Kanchi-in Kyakuden 観智院客殿 (Guest Hall, 1587), in Kyoto. |