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 position, the boards are stowed up top.
I believe that design is called shitomibame. But I couldn't confirm it, if any Japanese-literate readers want to help out: 蔀羽目?
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