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.

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)."

Tears That Brought Bamboo-shoots From the Frozen Earth: Meng Zong Meng Zong lived during the Three Kingdoms Period of China's past. His father died when he was young, and he and his mother struggled to survive. One winter his mother was stricken with a serious illness, and craved some bamboo-shoot broth as medicine. But in the depths of winter, with snow and ice blanketing the ground, where was anyone to find fresh bamboo shoots, shoots that emerge only in the warm months? Nonetheless, Meng Zong, to avoid disappointing his mother, bravely fetched his shovel and went out into the white landscape in search of bamboo shoots. In the thicket he found only frosted leaves and green stalks coated with snowflakes and ice. Look as he might, there were simply no fresh shoots growing in the winter. The thought of his poor mother lying sick on her bed, waiting for bamboo-broth medicine, made his heartache. Uncontrollably, tears began to fall in rivers to the ground beneath the tall, emerald canes. Even now, as his tears flowed down, he kept a light of faith in his heart. If he was truly sincere in his search, perhaps.... Just then Meng Zong nearly tripped and fell over a sharply protruding lump of earth. He quickly knelt down and knocked aside the dirt with his trembling fingers. How uncanny! Underneath his frozen hands he discovered a bed of fresh, tender bamboo shoots! Overjoyed, he gathered up a coatful and carried them back home. The broth that he quickly set stewing in the pot soon cured his mother's illness. The neighbors, hearing the story, exclaimed that it was the strength of his sincere, unselfish, filial resolve that inspired heaven and earth to respond, and to bring up, out of season, the fresh shoots that cured his mother's disease. Before Meng Zong's prayers generated this miracle, it was normally considered impossible for bamboo shoots to grow in the winter. After the nmiracle took place, however, people were able to gather and to eat bamboo shoots all year round. The winter variety that existed hereafter became known as "winter shoots." The villagers were deeply influenced by Meng Zong's courage and devotion. They renamed the spot where the event took place, "Meng Zong's Bamboo Grove". We can now enjoy bamboo sprouts during the winter as well, and as we do so, it is fitting to recollect Meng Zong's outstanding example of filial respect, and reflect on our conduct as sons and daughter of our parents. A verse in his honor says, His teardrops transformed winter at the roots; Up from the ice crept tender bamboo shoots. Instantly, the winter-sprouts matured; Heaven's will: a happy, peaceful world.

1. So-called Mukade ("centipede") tsuba are made of iron in which a centepede is inlaid in brass or copper wire. Mukade tsuba of Myōchin and Umetada warkmanship have been found with the inscription, "Made to the taste of Takeda Shingen".
2. There are those of solid iron, with need centers of brass, to the edges of which is affixed a weaving of brass and copper wires which is bound to the foundation disk by a rim, usually decorated simply.
3. Another type is of solid iron, bored at intervals and laced with braided or twisted wires of copper and brass.
4. The fourth type is a chrysanthemoid form, chiselled in open work and laced or woven tightly with copper and brass wire."

Compton Collection, Part II, p.p. 26-27, №54.

"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."