He held a high status in the Lin Family, and this surprise raid was also led by his father. Seeing him make a decision, that low-ranking Samurai no longer said a word, turned around, and went off to select the "Assault Team."
In this relatively narrow and complex terrain, the ashigaru rabble were basically useless; you couldn't take the enemy out with just feathered arrows either. It still depended on the long sabers of lower-grade Samurai and veteran Lang Faction members to tear open the enemy's line of defense.
......
Nozawa heard the enemy's persuasion for a couple of sentences and then silence, but he paid it no mind. It was impossible to make him hand over his weapons—sure, it's easy to give them up, but next to impossible to get them back. If anything unexpected happened, he'd be at their mercy; he'd regret it so much he'd want to rip his own guts out.
Rather than surrender and gamble on the enemy's kindness, he felt more secure relying on himself.