I know I posted some of these before, but I managed to track down the Sunrise Crusade – Yoroiden Samurai Troopers cards website. Here’s all the ones with Kayura or the Mashou. But feel free to check out the link to see the others, or just for more details. ^_^
More YST cards from Sunrise Crusade that I found on Yahoo Japan auctions.
Apparently this is part of a trading card game called Sunrise Crusade. (At least that’s the category it’s under. More results here.) DO WANT!
Source: Yahoo Japan auction.
Edit: 2nd image added. Found another auction of the cards, and they have an even closer view of them.