Shohei Ohtani has only been a Dodger for about a week, but he’s already getting the superstar treatment in L.A. … with brand-new murals popping up all over the city!!

TMZ Sports has learned … famous street artist Jonas Never — who has done work featuring LeBron James and Anthony Bourdain in the past — decided to welcome Ohtani to the Dodgers by whipping together a new piece near downtown L.A.

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JN used the Prociety shop as his canvas … and we’re told the whole thing took a day and a half to complete.

Of course, Ohtani is no stranger to the area — after all, he spent the first six years of his MLB career with the Angels.

Jonas also had help from fellow artist Droyce on the project … and we gotta say, it came out great!!

Jonas and Droyce weren’t the only ones busy over the weekend — another Ohtani tribute also went up in Manhattan Beach … and we’re guessing there will be plenty more by the time Opening Day comes around!!