Iron tsuba of round form with design of  hatchet, snowflake, and triple diamond in openwork (ko-sukashi), and inlaid with five concentric circles of brass dots (ten-zōgan) and brass inner circular line. Sukashi elements outlined in brass.

Late Muromachi period. Diameter: 82.4 mm; Thickness: 3.0 mm The triple lozenge (or diamond) is similar to the one on TSU-305 from Sasano Collection # 15. Very old motif; as Sasano remarks in his book "...represents the unstable political situation at the time".

Kokusai Tosogu Kai 5th International Convention & Exhibition, October 28-30, 2009 at NEZU Museum, Tokyo, Japan, on page 83 provides the following explanation of the triple diamond symbol: "The pine bark is the form of the Diamonds, "Bishi", mon, seen from Nara period, found on cloth stored in the Shoso In, and used primarily by the Takeda family. The form of Bishi mon [similar to ours] is called "Chu Kage Matsukawa Bishi", (Middle Shaded Pine Bark Diamond)."

A combination of hatchet (usually an axe) and a triple diamond (Matsukawabishi) alludes to the Nō play Hachi-no-ki (ref: Iron tsuba. The works of the exhibition "Kurogane no hana", The Japanese Sword Museum, 2014; AND Sasano: Japanese Sword Guard Masterpieces from the Sasano Collection. By Sasano Masayuki. Part One. Published in Japan in 1994.

Iron tsuba of round form with design of rudder, paddle, and stars in small openwork (ko-sukshi) outlined with brass wire, and further decorated with inlay of five concentric rows of brass dots or nail heads (ten-zōgan) and circular brass wire inlaid inside the innermost row of dots. Two lower round openings may also serve as udenuki-ana. Copper sekigane. Unsigned. Late Muromachi or Momoyama period, 16th century. Diameter: 90.4 x 89.8 x 2.8 mm.

Iron tsuba of round form with a butterfly (left) and dragonfly (right) design in openwork (sukashi), outlined with brass wire. The thin plate is also decorated with five concentric circular rows of brass dots (nail heads) in ten-zōgan; brass wire outlines the centre of the plate. School: Ōnin ten-zogan. Late Muromachi period, 16th century. Diameter: 88 mm, thickness at seppa-dai: 3.1 mm. Another tsuba of similar design, Tōshō school, is illustrated in this collection; see TSU-0353.2018. The design is referenced in LIB-1359.2017 Japanese Swords and Tsuba from the Professor A. Z. Freeman and the Phyllis Sharpe Memorial collections, Sotheby's, London, Thursday, 10 April 1997; p. 18, item 37: "pierced with two large formalised butterflies..."

Onin Tsuba with two overlapping lozenges, or interlocked diamond shapes. Iron and brass. Sukashi and ten-zogan technique. Muromachi period. Diameter: 81.0 mm; Thickness at seppa-dai: 3.2 mm The symbol of two overlapping lozenges (or, interlocked diamond shapes), presumably a family crest (kamon) may be deciphered as chigai kuginuki (nail extraction tool => 'conquered nine castles' ) or as chigai bishi (overlapping lozenges). Similar symbol can be found at Butterfield & Butterfield. IMPORTANT JAPANESE SWORDS, SWORD FITTINGS AND ARMOR. Auction Monday, November 19th, 1979. Sale # 3063], №94 with the following explanation: " This was the mon (crest) of the Yonekura family of Kaga Prov., at Kanazawa". An interesting insight is provided by Robert E. Haynes at Important Japanese kodogu, gaiso and works of art. San Francisco, April 9-11, 1982. Robert E. Haynes, Ltd., № 36 (see photo): "This would seem to be the Yonekura family mon. They were Seiwa-Genji Daimyō family made noble in 1696 and resided in Kanazawa in Kaga". Would it be possible that this is a late 17th century Ōnin tsuba?  

Iron tsuba of round form adorned with the design of stars, wild geese, floating blossoms, leaves and tendrils realized in brass inlay. The inlay technique includes suemon-zōgan and ten-zōgan. Two smaller openings (hitsu-ana) surrounded by a scalloped brass border. The seppa-dai border inlay is missing, as well as a few other fragments of inlay on both sides. Sword cut at 12 o'clock on the reverse. A tsuba with a strong autumnal connotation, which once belonged to a great battle weapon. One of only three known jūyō Ōnin tsuba. Translation of the paper, issued by the Japanese sword fittings (tosogu) examination board: Designated as jūyō-tosogu at the 34^th jūyō-shinsa held on April 14th 1988 Kaki-karimon zōgan-tsuba (花卉雁文象嵌鐔) — Tsuba with zōgan design of flowers and wild geese. Mumei: Onin (応仁) Tokyo. Nakasono Tokumi (中園とくみ) Measurements: height 9.5 cm, width 9.4 cm, thickness at rim 0.35 cm Interpretation: marugata, iron, brass zōgan, two hitsu-ana Time: end of Muromachi Explanation: Ōnin-tsuba are thin iron ita-tsuba which show a brass zōgan ornamentation. All of them are mumei and there is the theory that they were made in the Onin era (1467-1469) although today more and more the theory is accepted that they are in general late Muromachi period works. There are two kinds of brass zōgan interpretations: One depicts irregularly arranged tachibana branches, wild geese, chrysanthemums, flowers, or karakusa for example, and the other one shows punctual zōgan elements, which are referred to as hoshi-zōgan or ro-zōgan, and concentrical zōgan elements between the nakago-ana and the rim. The latter interpretations might also be accompanied by simple ko-sukashi in the form of butterflies, clouds, hats, or stylized mountains. This tsuba is a typical work from the former category. It is large and feels massive and the powerful and impressive zōgan and the excellent iron make it a highly tasteful piece. Back side: Issued to: Nakasono Tokumi Address: Tokyo-to, Suginami-ku, Kamitakaido 2-17-26 Date of issue: May 30^th 1989