small administrative unit (of a village)
A subdivision of a village or rural district, smaller than an 大字 (おおあざ). Used in addresses and land registries.
In addresses in this area, a 小字 may follow the 大字.
The registry includes even the 小字.
Compound of 小 (small) and 字 (section, administrative unit). The term is used in Japanese addressing and land registration systems.