Today I went to see tosa dogs and fell in love with them. What i saw first was a male and a female, they sniff me and start playing with me. They seem as excellent companions, who can be aggresive with nobody in the house but a love with their master and friends. I don't know if these two tosas represent a generalization to all the others, but i can say that these examples of the breed were very loving pets. If any breeder or owner of the dog had something to say about the overall temperament of the breed, I will be grateful.