Don't know much about the other ones, but I think of these breeds you named, at least the Tosa Inu needs more than just 'minimal exercise'.
Never heard of a Korean Mastiff by the way, so I looked it up. And my god, talk about excessive wrinkling. I didn't think there was a dog in existence that could match the Neapolitan in the loose skin department.
Never heard of a Korean Mastiff by the way, so I looked it up. And my god, talk about excessive wrinkling. I didn't think there was a dog in existence that could match the Neapolitan in the loose skin department.