This rectangular copper frying pan from Marushin is perfect for making Japanese tamagoyaki omelettes.
Copper has excellent thermal conductivity and heat retention properties, so the heat can spread uniformly over the cooking surface. As a result, you typically use less energy while cooking, and the omelette will be cooked more evenly, with fewer dak spots.
Copper cookware is very durable, hygenic, and corrosion-resistant. The rectangular shape of this pan is in the Kansai (western Japan) style, so if you're interested in cooking Kansai-style omelettes, it's perfect for you.
After using the pan, wait to cool down and clean with kitchen paper. Paint the pan with a bit of oil and store.
Another option is to clean with a sponge and soak lightly if you are concerned about oil.