Japanese crossword «Hedgehog»

I think that was the toughest puzzle I've ever done! I needed to use my 3 hints, but I figured it out in the end. Thanks for an amazing 4 hour challenge!

Wow! Is this 3.5 difficulty? Are you sure?

Elegant..

Difficult but fin to solve,beautiful picture,thank's

Very enjoyable. I thought it was impossible, but finally solved it, without hints or guesses. Thanks a million.