"Early signed example of the work of Koike Naomasa. The kiku shape iron plate is well finished. The flush inlay is brass, for the scroll work on both sides, with the leaves and kiri mon in brass, copper and silver with strong detail carving. Some of the inlay goes almost over the edge, which is goishi gata. The large hitsuana are plugged in lead with starburst kokuin surface design. [...]The face is signed in deep bold kanji: Koike Naomasa; the back is signed: Izumi no Kami, on the right and Yoshiro on the left. There are one or two small pieces of inlay missing. Sold by Sotheby London, Oct. 27, 1981, lot 368. Height = 86 mm, thickness (seppa-dai) = 3.75 mm, (edge) = 4 mm."Another similar example presented at: "Tsuba" by Günter Heckmann, 1995, №T55 — "Designation: Koike Naomasa. Mid Edo, end of the 17th century. Iron, hira-zogan in brass, copper, silver and shakudo, katakiri-bori. Tendrils and leaves. 87.0 x 78.0 x 4.0 mm." Reference: Japanische Schwertzierate by Lumir Jisl, 1967, page. 13. [SV: Actually, his tsuba is signed Izumi no Kami Yoshiro on the back; and Koike Naomasa on the front, exactly as Robert Haynes's tsuba. Dating this tsuba Mid-Edo, 17th century may be considered a misattribution]. More details regarding the Yoshirō tsuba.
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The chrysanthemoid (kiku-gata) iron plate with polished surface decorated with arabesque (karakusa) and paulownia (kiri) leaves and flowers in brass, copper and silver flush inlay (hira-zōgan) on both sides. Some of the inlay goes over the edge. Kozuka- and kogai-hitsu-ana are filled with lead plugs. Sekigane of copper. Chrysanthemum and paulownia are the symbols of imperial family. The face is signed: Izumi no Kami to the right of nakago-ana, and Yoshiro on the left; the back is signed Koike Naomasa. His signed work is considered by many experts to have been made-to-order only. The original wooden box (tomobako) with inscription (hakogaki) signed by Dr. Kazutaro Torigoye and dated Showa 39 (1964). The late Muromachi or Momoyama period, 16th century. Dimensions: 89 mm x 84 mm x 3.6 mm; Weight: 170 g. Hakogaki lid: Yoshirō kikka-gata Hakogaki lid inside: Iron, signed on the omote: Izumi no Kami – Yoshirō; on the ura: Koike Naomasa. Kikka-gata, pronounced maru-mumi, two hitsu-ana, karakusa, and kiri design in brass, silver, and suaka hira-zōgan. Height 8.5 cm, thickness 3.5 mm. Herewith I judge this work as authentic. On a lucky day in July of 1964. Torigoe Kōdō [Kazutarō] + kaō According to Robert Haynes [Catalog #7, 1983; №32, page 42-43] "This full form of the signature is seen very rarely". His example, illustrated in that catalogue, measures: height = 86 mm, thickness at seppa-dai = 3.75 mm and signed Izumi no Kami Yoshiro on the back and Koike Naomasa on the face. The further description of his specimen by Robert Haynes: -
Small iron tsuba for a dagger (tantō), of quatrefoil form (mokkō-gata), with raised rim (mimi), decorated with flat brass inlay (hira-zōgan) to form an abstract design alluding to the mushroom of immortality (reishi). Opening (hitsu-ana) to the left of nakaga-ana probably cut later and fitted with shakudo sekigane. Maker's signature on seppa-dai: Koike Naomasa (小池 直正).
Momoyama period: End of the 16th - beginning of the 17th century. Dimensions: Height 53.7 mm; Width: 45.5 mm; Thickness at centre: 3.5 mm; at rim: 4.9 mm. Other examples of signed Koike Naomasa work in this collection: TSU-0346. Reference: The closest example in literature is in Compton Collection (II): №11 with the description: “A Koike School tsuba, Edo period (circa 1625), signed Koike Yoshiro. Sheet-brass flush inlay of cloud forms and wire inlay creating the same shape. Koike Yoshiro Naomasa worked from the Keicho to the Genna periods (1596-1623). He arrived in Kyoto from Kaga.” [Japanese Swords and Sword Fittings from the Collection of Dr. Walter Ames Compton (Part II) / Sebastian Izzard, Yoshinori Munemura. — Christie's, New York, October 22, 1992]. See: Yoshirō tsuba.
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The so-called Yoshirō-tsuba [与四郎鐔] with an iron plate of mokkō form densely decorated with floral arabesque and adorned with eight pierced, chiselled and inlaid brass roundels and signed on both sides 'Koike Yoshirō Izumi no Kami Naomasa'. Four of the roundels are pierced and have geometrical designs representing flowers (e.g. wood sorrel) or snowflakes. Four others are solid and represent family crests; on one side: Mulberry (kaji) – mon of the Matsunaga clan [松永氏], Bamboo Grass (sasa) – mon of the Takenaka clan [竹中氏]), Wild Geese (kari) – mon of the Shibata clan [新発田氏]), and Pine Needles (matsuba); on the other side: Nine Stars (kuyō) – the Hosokawa clan [細川氏], Paulownia (kiri) – the Toyotomi clan [豊臣氏]), Bamboo Leaves (take) – the Minamoto clan [源], and Seven Treasures (shippo) – Izumo Genji clan [出雲源氏]. Hitsu-ana obliterated with a nanako-treated pewter plug. Brass with rainbow patina. Artist: Koike Izumi no Kami Naomasa (Japanese, active late 16th – early 17th century). The Momoyama or early Edo period, end of the 16th to the first half of the 17th century (1574-1650). Size: 81.7 x 78.8 x 4.3 cm. Provenance: Dr. Kazutaro Torigoye. Special thanks to Markus Sesko for providing the translation of hakogaki. Hakokaki lid (outside): 小池与四郎 – Koike Yoshirō Hakokaki lid (inside): 銘曰小池与四郎 – Mei’etsu: Koike Yoshirō – Signed: Koike Yoshirō 和泉守直正 – Izumi no Kami Naomasa – Izumi no Kami Naomasa 木瓜形 鉄地 – Mokkōgata, tetsu-ji – Lobed shape, of iron 真鍮据紋象嵌 – Shinchū suemon-zōgan – with brass suemon-zōgan inlay 縦二寸七分横二寸六分 – Tate ni-sun shichi-bu, yoko ni-sun roku-bu – Height 8.2 cm, width 7.9 cm 右正真也 – Migi shōshin nari – Above described object is authentic 昭和廾九年八月十一日 – Shōwa nijūkyūnen hachigatsu jūichinichi – August 11, 1954 草堂「花押」– Sōdō + kaō – Sōdō [pen name of Torigoye Kazutarō, 鳥越一太郎] + monogram Ref.: (1) Tsuba Geijutsu-Ko by Kazutaro Torigoye, 1960; (2) Tsuba. An aesthetic study. By Kazutaro Torigoye and Robert E. Haynes from the Tsuba Geijutsu-kō of Kazataro Torigoye. Edited and published by Alan L. Harvie for the Nothern California Japanese Sword Club, 1994-1997, p. Yoshirō, 4. See also Yoshirō tsuba. -
Iron tsuba of round form decorated with eight roundels – circular emblems of flowers and/or family crests (mon) made of cast brass, pierced and chiselled in kebori, and with flat brass inlay (hira-zōgan) of vines or leaves all over the plate. Both hitsu-ana trimmed with brass. Nakago-ana of trapezoidal form. A distinctive character of this tsuba is a mon at 6 hours depicting tomoe (comma). Yoshirō school (Kaga-Yoshirō). Attributed to Koike Yoshirō Naomasa himself. Unsigned. The Momoyama or early Edo period, end of the 16th to the first half of the 17th century (1574-1650). Size: Diameter 82.0 mm, thickness 3.8 mm at seppa-dai, 3.4 mm at rim.
