Phase 1: Calculated Strikes & Grapples
Iwami is a powerful and methodical fighter. He uses slow, heavy punches that deal massive damage if they connect. He also has a dangerous grapple attack that can be hard to escape. The best strategy is to stay mobile, dodging his heavy swings and then punishing his recovery frames. Don't try to block his heaviest attacks, as they can break your guard easily. Focus on short, precise combos after dodging. If he grapples you, mash the indicated button to escape quickly.
Phase 2: Enhanced Speed & Unblockable Attacks
At roughly 50% health, Iwami becomes much faster and gains several unblockable attacks, often indicated by a red aura. He might also use a powerful charge attack that covers a lot of ground. This is the most dangerous phase. Use Extreme Heat Mode if you have it, and unleash all your most powerful Heat Actions. If not, maintain extreme caution. Only attack after he commits to an attack and misses. Consider using a Toughness Emperor to keep your Heat Gauge full for defensive Heat Actions or quick counters. This is a battle of attrition; patience is key.
Rewards: Large experience bonus, rare items, story progression.