noun
field latrine; night-soil pit in a field
Refers to a traditional pit dug in a field for use as a toilet, often for collecting night soil as fertilizer. Now largely historical or rural.
昔の農家では、野壺の肥やしを畑に使っていた。
In old farmhouses, they used the manure from the field latrine on the fields.
この辺りにはまだ野壺が残っている。
There are still field latrines remaining around here.
Compound of 野 (の, 'field') and 壺 (つぼ, 'pot' or 'pit'), literally 'field pit'. The term reflects its function as a pit dug in a field for use as a toilet.