Startup Idea : DoorDash and Yelp for Japanese food in US

I want to solve a health problem and hunger for Japanese food. Japanese food is called 'WASYOKU' in Japan. So my business concept is 'WASYOKU on demand'. I know Japanese food is very healthy. When I visited US last month for 1 week, I gained 3 kilos with American Food. After coming back to Japan, with Japanese food I lost 3 kilos. Now I believe American should eat more Japanese food. And I thought it was very difficult to find Japanese food restaurants in NY. Yelp was poor at Japanese food. So I'm making smartphone application that enables you to find Japanese restaurants or order Japanese food's delivery(catering) service much more easy.