ハンバーグ Hamburg - is yet another popular dish in Japan. It definitely is western influenced but over the years, Japanese has revised the recipe to cater to their taste buds.
If you're so willing, here's one of many sites with ハンバーグ recipe:
Japanese Cooking 101
You can also dl the video here
(Subbed) Gaki No Tsukai - Foodie Report Part 2 by ShibataBread