Yes, that’s a Retriever in a jinbei (甚平) you see on the right.
Dog clothes are very common in Tokyo—perhaps 20-30% of the dogs as forced to wear clothes here. In my more-money-than-brains neighborhood, Denenchofu Tokyo, maybe 80% of the sorry beasts have to wear clown suits.
Yesterday, I was joking with my veterinarian about the absurdity of a customer’s Labrador Retriever wearing a raincoat. The vet agreed that Labs have especially oily fur to make them “waterproof,” but he explained that Japanese houses with tatami mats and shoddy softwood flooring are ill suited to wet dogs (especially during the rainy season now).
Traditionally, Japanese dogs are only kept outside (and chained all day on a 30cm lead in the hot sun). In modern apartments and condos where dogs must come inside, Japanese people prefer to keep their dogs dry and what the vet called,”osharei” fashionable.
Japanese dog “traditionally” chained all day and night (L), Japanese dog dead from being chained (R) at my vet’s office