- The mizu-zuka was a shelter in a case of floods seen in regions of Gunma Prefecture, being a wooden tower building of two stories erected on an elevated earth; the first floor stored miso (soybean paste) and other food and temporarily stored household goods, whereas, the second floor was used as a living quarter.
-水塚とは群馬県地方にみられる水害のときの避難施設であり、盛り土の上に木造二階建ての搭状の建物で１階が味噌や食料の貯蔵と家財道具の一時保管場所で2階が居住空間となっている。