Well, you can say it's an omelette or you can call it a rectangular egg layer. It's overall easy and so good to eat.
All you need is a few ingredients to make it taste as they make it in Japan. A small rectangular egg cooking pan. I found it in a thrift store but easy enough to find online or in Asain supermarket.
Ingredients are as follows:
2 eggs, 1 teaspoon of sake, sugar, dashi, and water mixed with the eggs.
Oil the pan just enough to cover the bottom and heat to medium-hot. Add the egg a little egg mixture till covered. Flip a little at a time and push till the end of the pan.
Add some more and cook it all until it's a nice little square.
Cut up to bite-size pieces and add some soy sauce and enjoy.
Watch the video to show you how I did it.