Can a Shiba Inu defend itself?

Sure, here's a description in the tone of a questioner: "I've heard that Shiba Inus are small and cute dogs, but I've also heard that they can be quite fierce when necessary. So, my question is, can a Shiba Inu actually defend itself? Are they physically capable of fighting off an attacker, or are they more of a companion breed that relies on humans for protection? I'm curious to know how these dogs would fare in a dangerous situation, and whether or not they have the instincts and abilities to protect themselves if needed.