Don’t be scared by hunger.
Seriously, I went deep into “famished” (less hungry than “starving”, but more than “very hungry”) in the middle of winter forest (foraging barely drops anything in winter). This was before the oaks that drop tons of acorns were added. I recovered by killing a single fox, giant fly or some critter like those.
You can stay alive for a week or two without any food.
Ninjutsu is amazing for weapon damage boosts - it will double cut damage on crits
Brawling gives feint and knockback that can be used with weapons
However if you ever reach the point where you acquire a diamond katana, you’ll be so strong that you won’t need it. Every single of my endgame characters can easily wreck a hulk unarmed and I haven’t seen a diamond katana in game, let alone the forge that is required to make diamond weapons.