These are my personal opinions. I researched some to make sure they fit the personalities of the men. I wrote the man, the dog breed and then why :) Hope you enjoy! Share your thoughts :D
Baba Mitsunari: Golden Retriever
Goldies are one of the most popular dog breeds. They excel at retrieving game for hunters, tracking, sniffing out drugs, and as therapy and assistance dogs. It’s all good with the Golden: he’s highly intelligent, sociable, beautiful, and loyal.
Ota Kisaki: Beagle
Beagles are gentle, sweet, and funny. They will make you laugh, but that’s when they’re not making you cry because of their often naughty behavior. Beagle people spend a lot of time trying to outthink their dogs. Although they are loving and gentle, Beagles can have an independent, stubborn streak
Mamoru Kishi: Bullmastiff
The Bullmastiff is a calm, low-energy dog—it’s even known to be a lazy dog, clearly OK with lying on the sofa. However, because he is such a large dog, obesity can be a concern. Mastiffs can be firm and fearless family guardians. While standoffish toward strangers he’s got a soft spot for his loved ones.
Eisuke Ichinomiya: Poodle
Elegant. Proud. Clever. Poodles are impressive dogs, as many are best-in-show winners. These are real dogs bred to do real jobs. Also they are people-friendly dogs who want to stay close to their families. Though they get lonely when left by themselves for long periods — but, are always up for a good game.
Soryu Oh: Great Dane
A Great Dane is sleek and elegant with a gentle soul. However, his size and his power bark will scare the wits out of most people. Anyone who owns one of these dogs eventually understands that while you may be used to his awesome size, others usually need a little time to get there. He also has an athletic, muscular body.
Inui Ryosuke: Samoyed
The well-bred Samoyed is an intelligent, gentle, and loyal dog. He is friendly and affectionate with his family, including the children, and thrives on being part of household activity.
The Samoyed is not a “lone wolf” dog — he enjoys close association and is mentally and physically unsuited for being left alone. His loyalty and alertness often make for a good watchdog.