As a practical matter, does 4 bowls and 2 plates per person, and preparing 4-5 different dishes, every day have a huge overhead in preparation, cooking and washing up?
For example, cooking rice is simply a matter of putting rice and water into the cooker and pressing a button [1]. In the past we needed to first rinse the rice by hand.
[1] https://www.japantimes.co.jp/news/2009/04/16/reference/no-wa...