I think I found what I was looking for. 
 
	This katana by Kotani Yasunori, in October 1935 is recorded as his third blade he made at the Yasukuni Shrine— according Kotani's daughter the first went to the Shōwa Emperor, the second to the Imperial Household. It was owned by Kudo Haruto, chairman of the Yasuki Steel Company and one of the founders of the Nihontō Tanren Kai. In the 1990s, it was polished by Okisato Fujishiro, and Yasunori himself added a saya-gaki to the blade. It was later exhibited at the 60th anniversary Yasukuni exhibition and comes with extensive documentation and a 1997 NTHK paper. 
 
	The seller has all the papers including all exchanged letters from Kotani San and the togishi. 
 
	Nice story! 
 
	Link : https://www.nihontocraft.com/Kotani_Yasunori_Tachi.html?