When I first saw Yoshida's work, it immediately reminded me of classic watercolors from many a fine BD series.
Amazingly, these seem to be -not- watercolors, but woodblock art, in which a series of blocks are carved to impress the total number of ink colors present in a piece. Not unlike screen-printing, but far more laborious I should think. Of course the point of processes like these (and lithography) is to be able to produce a run of high-quality prints using very basic materials.
I'm still learning about Yoshida, but one thing that seems unusual about him is that he made a point of getting out of Japan and exploring as much of the world as he could. Hence, you see authentic Japanese prints of places not normally associated with the style, starting with India.
This is a great find.