I'll post mine here (actually the one that is on my type 98 shin-guntō!), for the record:
This is a Daki Omodaka mon 抱面高 (alternate spelling for Omodaka: 沢瀉).
Associated families are: Shiina, Someda/Yanada, Mori, Kinoshita, Asano, Sakai, Horikoshi, Mizuno, Tsuchii, Fukushima, etc.
椎名、梁田、毛利、木下、浅野、酒井、堀越、沢井、水野、土井、福島など
(Information provided by SteveM)