You really are funny.
Peculiar rather than haha ..... but, anyway .... don't let me stop you ... carry on.
There is no argument bro that Chinese food is much tastier and healthier. Can you get ﾂ湘??堋ｫﾅ陳｢ in Japan? It probably the most delicious and healthiest dish a man can get, my wife was very happy with the result. Any ways.
Okay, putting two ingredients on top of each other is not "cooking". So therefore Sushi is not considered dish, just two ingredients.
If you look at all Japanese cooking that require cooking, almost all come from China and Korea, for example Ramen (Chinese Lamian), Yakiniku (Korean BBQ), Gyoza (Chnese jiaozi), yakisoba (Chowmien), Tofu and of course rice itself which came from china to Japan. And many others if you bother to do some research once in a while.
There are few native Japanese dishes, but a large proportion of Japanese food are really Chinese food with some bit of variation.
Good thing is that Chinese are so much more creative when it comes to food than Japanese, Chinese can use ingredients that no other Japanese even have the balls to touch such as monkey brains.
But who knows maybe one day, the Japanese will steal another famous Chinese dish, give it a kunyomi name, commerialise it to the Western world.