Northstar,
I beg to disagree with your alleged rock marker....its just ordinary Odd Shape Rock that look like shoe.
If you want to see a Jap shoe rock marker....it should look like a shoe or boots...not a rock. Just imagine if the surrounding area is full of those odd shape rocks. Your imagination will going crazy thinking all those surrounding odd shape rocks will be assumed to be japs marker? which results into EXPENSIVE USELESS DIG HOLES.
Observe a terracotta soldier shoe or.... shoe of a statue...that whats you expect to look like, if you want a Japs rock shoe marker....beautifully carved even a 5 year old kid can identify it (thats what Japs marker are for, right...to inform not to confuse). If you are in doubt of its shape...its not a Japs marker. Bcoz Japs marker are WELL DEFINED and BEAUTIFULLY CARVED....crafted by a Japs artist, oks?