Does anyone have any tips for beating Yatsukazou, the big stone statue warrior thing at the end of the 4 cave Izumo quest chain? I'm struggling to beat him, especially as melee seems to be a death sentence.

I'm on pure POW build and it's actually easy if you got a Kikuichimonji (Lv9 Gold Sword) or Kotetsu (Lv13 Red Star Sword) with the skill Blue Fang. My Magatama setup was 2x Mushiro (+200 ATK) and 1x Purification Magatama (Entry Key). Both my Kiku and Kotetsu has Blue Fang III and each time I use a ranged skill, the boss reacts by using that drill-like skill so after using a ranged skill like Blue Fang twice, I quickly roll to the side and use an SP regen food while he's still on drilling animation, rinse repeat.