Student meals in Japan

Hi, so I am an exchange student studying in Tokyo this year. I am really struggling to find healthy meal ideas that are affordable. I live in one of the commuter suburbs surrounding Kawasaki but have access to supermarkets and conbini. In terms of cooking appliances I have a single IH burner and a microwave with shared access to a kettle.

Can you guys help me with healthy but filling Japanese meals that would work for a student? Also still not sure what to have for breakfast here? Any recommendations or links to recipes would be greatly appreciated. I would love to be able to eat healthy like a local and learn some new healthy dishes

by Remarkable_Star_6304