Momotaro Dentetsu: Showa, Heisei, Reiwa mo Teiban!
What is interesting is that Clubhouse Games: 51 Worldwide Classics and Momotaro Dentetsu: Showa, Heisei, Reiwa mo Teiban!, two non-Nintendo franchises, made second and third over the likes of Mario and Smash Bros. Both games are also socially-focused multiplayer games.
He also runs a YouTube channel about Japan stuff called TheDoctorDazza, tweets at @DoctorDazza, and posts photos of his travels on Instagram.