Hello Fung, I am not sure if you are still looking for a Yasukuni sword, but I own a sword made by Yasunobu in the Yasukuni shrine on a lucky day (Kichi Jitsu) in September in 1944. It was made for Lieutenenat General Moratai, but the tsuka was (perhaps) never finished and it is in shirasaya. I have had it for 25 years and acquired it from the widow of an American who may have been given it by the General at the end of the war, in Japan. I have not really tried to sell it yet. I have done some research and had the tang writings translated. I have communicated with some Militaria dealers who helped with the translation, but I was not considering selling at the time. This is what one of them said:
“ Very nice sword made by Yasunobu in Yasukuni shrine on a lucky day September in 1944.It's a real nihonto made of tamagahana steel, very, very valuable.
I am considering selling it and was wondering if you might be interested in buying it. It still has the original purple silk bag with red tassels and the blade itself if in pristine condition.
Please let me know if you are interested or would like more photos.