noun
guest book; visitors' book
A formal register for recording the names of visitors, often used at events, hotels, or official receptions.
受付に来客芳名録が置いてありますので、ご記入ください。
There is a guest book at the reception desk, so please sign it.
Compound of 来客 (visitor) + 芳名 (esteemed name) + 録 (record). The exact historical derivation is uncertain, but the word follows a common pattern for formal registers.