Iron tsuba of mokkō-form with a pine and a frog on the face and a snail on the back, carved and inlaid with gold. Each figurative element of the design is signed on three inlaid cartouches: Masaharu (正春), Kazuyuki (一之), and Yoshikazu (良一) [read by Markus Sesko]. Snake, snail, and frog together make a design called "SANSUKUMI" - Three Cringing Ones [Merrily Baird]. The snail can poison the snake, the frog eats the snail, and the snake eats the frog. It's unclear whether the pine replaces the snake on this tsuba, or the snake is hiding in the pine? Anyway, the frog and the snail are clearly represented. "Maybe we have here a joint work with Masaharu (the silver cartouche next to the pine) being the master and making the plate and Kazuyuki and Yoshikazu as his students carving out the frog and the snail respectively". Copper sekigane.

Dimensions: 70.9 x 67.2 x 3.0 mm. Edo period (18th century).

Markus Sesko writes: "I agree, the frog and the snail most likely allude to the san-sukumi motif. It is possible that we have here an artist's choice to deliberately leave out the snake, maybe he thought that the motif is already obvious and there is no need to add a snake to make it clear that the tsuba shows the san-sukumi motif." [Markus Sesko].

Kazuyuki (一之): adopted son of Kumagai Yoshiyuki, student of Ichijō (Gotō-Ichijō Scool) [M. Sesko 'Genealogies', page 19.] Masaharu (正春): Kasuya fam., student of Masamichi (1707-1757) who was the 4th generation Nomura School master in Edo. [M. Sesko 'Genealogies', page 49.]