noun
owner of a brothel or restaurant
Refers to the proprietor of a 妓楼 (brothel) or 酒楼 (restaurant/bar). The term is somewhat specialized and may appear in historical or literary contexts.
その楼主は、店の評判を守るために厳しい規則を設けた。
The owner of the establishment set strict rules to protect its reputation.
楼主は客一人ひとりに丁寧に挨拶をした。
The proprietor greeted each guest politely.