noun
family custom; family tradition
Refers to a custom or practice passed down within a particular family. Somewhat formal and not an everyday word; 家の習慣 (ie no shūkan) is more common in casual speech.
この家例は江戸時代から続いている。
This family custom has been passed down since the Edo period.
家例に従って、正月には必ず親戚が集まる。
Following the family tradition, relatives always gather for New Year's.