User blog comment:OutteBill/MHFU - Yamatsukami break whisker confirmation/@comment-5043481-20130701213225

One thing is for certain, there is a breakable on him somewhere. After a battle I ussually get an item on the 3rd row, where break rewards go. I have always presumed this to be from if front tentacles (not whiskers). However, i have never noticed any break vissually, unless the visual break is his stomach shrinking.

Oddly, when you get those weird graphical glitches when you see inside the monster, I have seen a cross section that looks suspiciosly like the pattern on a severed tail. I have yet to cut it though, even after hacking at it for the whole quest with Brunhilde. Seems dragon element won't do.