It's a widely known aspect of Japanese culture that even the most ignorant head-in-the-sand Westerner would recognize. It's like naming your con "Sushi Con" or "Geisha Con" or "Samurai Con" or "Unimaginative Anime Nerds With Teaspoon-Shallow Understanding Of The Culture They Profess To Admire Con." It's like if somebody in Japan set up a convention celebrating US superhero comics and named it "Burger Con."