Considering it looks hand-drawn that map could be improvable. The 3rd from bottom square in the first image seems wrong, what looks like a left path really is just a straight path in the game, I didn’t even know there was a biforcation to the right there. Can still be helpful though.
With a quick Google search I found this: 
(starts from the midpoint). Comes from the North American Ys VI strategy guide.
"Considering it looks hand-drawn that map could be improvable. The 3rd from bottom square in the first image seems wrong, what looks like a left path really is just a straight path in the game"
Yeah, this got me confused at first too, but overall I think this map is pretty useful for routing the cave, what I did in my run notes is that I just traced the path I should follow and it worked pretty well. also, the fact that the item locations are noted on the map is a really big plus.
PS: I didn't draw the map
