Search for shojin ryori, it's the food made at Buddhist temples (or temples of related religions), and probably it isn't the cheapest food. There are some well

Search for shojin ryori, it's the food made at Buddhist temples (or temples of related religions), and probably it isn't the cheapest food. There are some well evaluated shojin ryori books on Amazon. Some temples will do vegan food, others will have eggs and milk, but I think you'll rarely find any kind of meat in it. On the other hand, I'd love if they didn't put fish stock in everything, including ramen, I really like ramen. I found a ramen house where I live (Sao Paulo, there's a huge Japanese/Asian neighbourhood in here, and it's a great place to find vegetarian ingredients such as mushrooms) which offers one dish without fish stock, but they closed and reopened, and now I'm not sure they still have it on the menu. And what has been said about vegetarianism in Japanese culture is true. They probably think fishes come from trees. I actually had an uncle (I'm from a Japanese family) who said he was vegetarian but ate fish.