Iron tsuba of mokkō form (mokkōgata) pierced (sukashi) and inlaid with precast dark brass inlay (taka-zōgan) with somewhat abstract/geometrical design that can be liberally described as pines, mist, and snow.

Momoyama or early Edo period. End of the 16th - beginning of the 17th century. Heianjō school. Unsigned. Dimensions: 86.8 x 82.9 x 4.5 mm.

Shakudō tsuba of the slightly vertically elongated round form (nagamaru-gata) decorated by gold in flat inlay (hira-zōgan) with three insects (cricket, locust, and praying mantis), grass and dewdrops motif. Kogai hitsu-ana is plugged with gilded soft metal. Height: 70.2 mm; width: 66.4 mm x Thickness at seppa-dai: 4.5 mm. Edo period (from ca. 1700 to ca. 1850) Unsigned. Attributed to Kaga School or Murakami School. Almost identical tsuba (no dewdrops, though) is illustrated and described at page 60 of Kokusai Tosogu Kai. 7th International Convention & Exhibition, November 1st, 2011 at Tokyo National Museum, page 60. It is attributed to the Kaga School, Mid Edo period (Late 17th - early 18th century). Dimensions: 70.5 x 66 x 4.5 mm. "The rich black shakudo plate has been slightly lowered (dished out) and then polished. Gold insects crawl amongst grasses, depicted by Kaga style hirazogan (flat inlay). One tendril of the mantis overlaps onto seppa-dai. The mantis boldly looks out from the tsuba in a curious way. This style of Kaga tsuba was popular during the Genroku era (1688-1703)."   Another source is Japanese Sword Fittings. A descriptive catalogue of the Collection of G.H. Naunton, Esq., completed and illustrated by Henri L. Joly, - 1912:

Kanazawa in Kaga was a centre of fine metal work during the whole of the Tokugawa period. At first the inlayers of Fushimi following the Daimyo Maeda went to Kanazawa, then some of the Gotō masters proceeded from Kyoto for short periods to work for the Daimyo, so that their influence was strongly impressed upon Kaga work..." A somewhat look-a-like tsuba is illustrated at plate XXVIII, Kaga Inlay, №653 with the following description at page 52: "Shakudō, inlaid with five insects in gold: crickets, praying mantis, grasshopper, in the style of Takagawara Ujitsugu.

According to M. Sesko, Ujitsugu was a master from Katsuki and Kaneko School in Kaga, son of Ujihira. Ujihira's father Ujiyoshi died in 1802. This brings us to the mid-19th century, instead of mid-18th or earlier. On the other hand, a very much look alike specimen at MFA collection (ACCESSION NUMBER 17.1061) has the with the following description: Edo period. Late 18th–early 19th century. Murakami School. Main material: shakudo; other metals: gold; decorative technique: iroe hirazogan. A detailed account of Murakami school can be found at The Japanese toso-kinko Schools.// Lulu Inc., 2012 by Markus Sesko, on pages 235-239. All-in-all, it's either Kaga School or Murakami School, either ca. 1700 or ca. 1850. Quite a range! SOLD

Iron tsuba with hammer marked surface and design of a plum and cherry blossoms to the right of nakaga-ana in openwork (sukashi). Raised rim, typical to katchushi school. The thickness of the plate provides for later Muromachi period making.

Late Muromachi period (1514-1573). Size: 85.8 x 85.0 x 3.6 (center), 4.1 (rim) mm; weight: 136 g.  

Iron tsuba decorated with sparrows and bamboo inlaid and chiseled in yellow brass, with snow lying on bamboo leaves inlaid in silver-ish shibuichi. Copper sekigane. The kogai-hitsu-ana probably cut out at a later date. Heianjō school. Unsigned. Height: 86.0 mm, Width: 85.4 mm, Thickness at seppa-dai: 2.9 mm. Momoyama or early Edo period, first half of the 17th century. Merrily Baird, Symbols..., page 118: "The association of the sparrow (suzume) with both bamboo and rice heads is an old one found in Japanese poetry, paining, and design."

Mokkō-form (kirikomi-mokkō-gata) iron plate of grey colour decorated on both sides with waves, reeds, cloud, pagoda, and thatched hut in low relief (sukidashi-bori). The kozuka-hitsu-ana is original, the kogai-hitsu-ana probably cut later (lacks raised rim, fuchidoru). Wide (5.7 mm) raised rim of rounded square dote-mimi type, decorated with fine cross-hatching. Momoyama period, 16th century. Dimensions: Height: 75.9 mm, width: 76.4 mm, Thickness at seppa-dai: 2.3 mm, at rim 4.4 mm. Kamakura-bori tsuba of such a form is unusual. The rim is also unusual; it is possible that cross-hatching was done as a preparatory step for damascening, or the the damascening (gold or silver) disappeared with passage of time.

Iron tsuba of 8-lobed form pierced with six openings (sukashi) and decorated with design of bamboo and arabesque in flat brass inlay (hira-zōgan). Two of the openings serve as hitsu-ana. The design on the face represents bamboo trunks and leaves, clouds, waves, and vines; on the back - vines and leaves, that forms an arabesque (karakusa) motif. Rounded square rim. 'Silver' patina. Hitsu-ana with copper sekigane. Heianjō (most probable) or Kaga-Yoshirō school. Late Muromachi or Momoyama period; 16th century. Size: Height: 74.6 mm; Width: 69.5 mm; Thickness at seppa-dai: 4.2 mm. Weight: 113.9 g. Provenance: Gary D. Murtha. This tsuba is illustrated at: Japanese sword guards. Onin - Heianjo - Yoshiro by Gary D. Murtha [GDM Publications, 2016, p. 48]: "Iron, 80x75x3 mm tsuba with brass karakusa vines and leaves on one side with bamboo, leaves, and clouds on the reverse. This tsuba is one of those pieces that might be classified as Onin or Heianjo work, but the flush inlay tips it to the Heianjo side. Late Muromachi period." I would like to add that it easily may also be classified as Kaga-Yoshirō. Robert Haynes in Study Collection.., page 32, illustrates a look-a-like example, and writes: "This style of inlay, where the designs on the face and the back are very different, was common to the work of artists in Kyoto in the Momoyama period."