There are probably millions of Japanese people who have a "shi" in their name followed by a character that starts with a "t" sound. It's hardly anything unusual. Technically, Takashi Tokita wouldn't even be an example because Japanese people write their names with the surname first, so it'd be Tokita Takashi to them. It'd make more sense to snicker at, say, Yoshitaka Amano's name, which one couldn't even write on GameFAQs back in the day because it was automatically flagged as cursing. But even then, in Japanese, there's no such thing as a "t" that exists by itself. The characters in Amano's given name are Yo-shi-ta-ka. But none of this really matters because making fun of anybody's name is immature to begin with, and making fun of a foreigner's name is ignorant on top of that.