Tsuba: suisha — waterwheel with buckets, wave/river below
Shape: maru-gata
Dimensions: 78 × 78 × 5 mm
Material / technique: iron, ji-sukashi
Mimi: kaku-mimi ko-niku; localized subtle linear tekkotsu
Hitsu-ana: two oval, symmetrical
Sekigane: pair of copper inserts at top/bottom set in semicircular seats — kuchi-beni type (“painted lips”); tagane-ato visible on the lower insert from adjustment
Attribution: Inshu Suruga — regular maru-gata, clean sukashi layout, and the characteristic kuchi-beni sekigane.

Inshū (因州) is the old name for Inaba Province—roughly the eastern part of today’s Tottori Prefecture.
In the school name **Inshū Suruga**, it means the Suruga family/workshop working in Inaba Province, distinguishing it from the Suruga group active in Edo.