Etymology and distribution of 灯中.

Tounaka 【灯中】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Toyama-ken , Hokkaidou · Kanagawa-ken . Originated from Hayatsuki River flowing through Toyama-ken . The old name of the place name is "Izuki River (Hekigigawa)". In the Muromachi era it became pronunciation of Hayatsuki and was also written as "Hayatikawa."