Tosa should be fantastic with people. They should be very gentle and loving tward family members. A bit of a clown. Reserved and aloof but never agressive twards strangers. Highly dominant and agressive with dogs of the same sex. Not the dog for a dogpark or a off lead walk. Can be very prey driven twards other small animals like cats. Very strong and powerful so they should only be bought and owned by those who can handle them on a lead. The biggest problem you will most likley run into isn't your dog, but strange dogs off lead charging your Tosa and situations like that. That is what makes the breed unsuitable for most situations.