In pre-industrial Japan, the predecessor to storm windows were these hinged panels.Image: Ktmchi, CC BY-SA 4.0 Called shitomi or hajitomi, these wooden lattices were supported by hooks hanging from the eaves.Image: Ktmchi, CC BY-SA 4.0 However, in the town of Tsuwano in western Japan, you can find this sliding, non-hinged variant. The boards ride in tracks, and rest atop one another.In the open po