Lol, beaten to the punch, Hokusai and Hiroshige are among my favourite artists. Not too many comments and suggestions - the rocks in the sea are coloured differently to your ground texture in the dungeon - I wonder if they should be the same?

I really do like the texture you've used for the undergrowth. I'm intrigued by the large orange rectangle top left, what is it meant to be?

To give the impression that the cave is elevated high above the sea you might want to draw a cliff face? (not sure how high the cave is meant to be).

Lovely map.