I have been watching NHK-World a lot lately. I really like Itadakimasu - Dining with the chef.
They had Japanese style Hamburger some time ago.
I had a look on the homepage and got the receipe.
You can find the receipe here if you want to give it a try too:
The hamburgers were really easy to make and tasted like hamburgers we tried in Japan.
They were delicious!