The fifteenth print appearing in Volume 3 of Gishi taikan, edited by Fukumoto Nichinan.
Pictured is Muramatsu Sandayū Takanao 村松三太夫高直 (1677-1703), one of the Righteous Samurai, sword in hand, with fellow avenger Mimura Jirozaemon 三村次郎左衛門 (1666-1703), testing the sharpness of his sword against a pillar at the sword sharpener's shop in Yanagihara, Kanda in Edo. According to legend, Sandayū brought his beloved sword to be sharpened before the raid on Kira's mansion. In section 180 of Fukumoto's Genroku Kaikyoroku, he notes in the appendix to that section that this story does not appear in Issekiwa 一夕話 [Akō gishi den issekiwa 赤穂 義士 傳 一夕話, written in 1854], a source he often references, but that "some of the stories that happened in Edo are often recognized as true, so I have included them here for the time being."
In the same section of Genroku Kaikyoroku he relates that Sandayū's comrade Mimura Jirozaemon knew of a sword sharpener called Togiya 研屋（とぎや）\who lived in Yanagihara, Kanda and that Sandayū wanted his favorite sword carefully sharpened. Leaving the sword with Takeyo, they returned on December 12, two days before the assassination of Kira, asking if the sword was ready. Applying in the affirmative, Togiya presented it to Sandayū. In looking at the sword they were impressed with its "heavenly sensation" and that the sword reflected light in all directions. Sandayū then asked if he could test the sword against the middle pillar of the shop and receiving Togiya's affirmative response "cut the middle pillar by more than two centimeters." Afterward "the three of them sat in a circle, drinking and chatting, and soon the two guests left Takeya's in a state of utter exultation."
Fukumoto goes on to relate that after the vendetta was successfully carried out Togiya "carefully wrapped the pillar on which Sandayū had inflicted the sword wound with silk and made it a family honor" which people from all around came to see. 
 all quotations are my translations of Section 180 titled 村松喜兵衛と三太夫 of Fukumoto's Genroku Kaikyoroku.
Suga Tatehiko at the age of 64.
image source: Mitsukoshi Osaka, "Gaka hōmon dai-3-kai," Mitsukoshi (July 1942)