Mascots are a really big deal in Japan. I can really think of any organizations or entities that don’t have one.
I spotted this charming poster in a local government office that features the mascots of the wards of Yokohama (think boroughs or arrondissements). My ward is the saxophone-playing seagull, スウィンギー (Swingy). You can read all about Yokohama’s ward mascots here.