A small outbuilding or shed used to store tools, hay, or other items (often on a farm or at a house).
昔、家の裏に大きな納屋があった。
There used to be a large shed behind the house.
農家の納屋に干し草や農機具をしまう。
Farmers store hay and tools in the barn/shed.
台風で納屋の屋根が壊れてしまった。
The typhoon damaged the roof of the shed.