Question

What would a samurai might do if he lost or broke his sword?

Answer 1

Fight until his last breath and perhaps even die with honor or complete his original purpose for being there first. However the samurai might (would probably) have a backup. Hope this helps

Answer 2

Answer: They would most likely attain a replacement from their retinue if possible rather than immediately transition to the far less effective sword

Step-by-step explanation:

But, Only if acquiring another spear or naginata was impractical would they be likely to transition to the sword.