I Found this blog recently and have been enjoying it. Titled 鐔鑑賞記 by Zenzai (Tsuba Kanshiyou Ki – Zenzai’s account of Tsuba Appreciation) is appears to contains a lot of pieces previously available at Ginza Choyusha. There are some really nice kodôgu here.
There are some great photos and the write ups if you can read them are interesting. I hope you enjoy it.