Every living thing has its own area called personal space.
And when something unknown enters that area, they feel uneasy or uncomfortable.
Even humans get nervous when someone he/she doesn't know well is standing right next to him/her, and dogs are no different.
When someone enters a dog's personal space, dogs will react by threatening or running away. In the worst case scenario, they may even bite.
When dogs repeatedly approach and move away from each other while maintaining a certain distance, they are trying to interact with each other while protecting their personal space.
However, the size of this personal space varies from dog to dog, so a safe distance for one dog is often not safe for the other. And this is when fights break out.
Especially in the case of the Shiba Inu, a breed that has a long history of living alone outdoors, they tend to have more personal space than other breeds.
So even if your Shiba Inu is more intimidating or fearful than other dogs, it is not an unusual behavior.
To help your dog to get along with other dogs, you should make sure of keeping your dog's personal space at first and wait slowly until the dogs finish greeting each other.