Hongan (also called Ubusuna) refers to the registered address on the family register under the Ritsuryo system (a system of centralized government based on the Ritsuryo code) in China, the Korean Peninsula, and Japan.
本貫（ほんがん/うぶすな）は、中国・朝鮮半島及び日本の律令制で戸籍に記載された本籍地のことをいう。