Following youtube videos are very informative and nice:
Cooking With Dog - How To Make Japanese Dishes
From a cat owner, the most challenging thing to cook Japanese food in your country, I think, is "alcohol". This is not about alcohol for drinking, but more about use of alcohol as a preservative in soy sauce, miso or other basic Japanese condiments.
You can find organic soy sauce which does not contain any additives, but during the natural brewing process, it produces a tiny amount of alcohol by itself.
My cat suggests that you should use Japanese ingredients to enhance taste/flavor of
your local food. This does not cause much hustles, I think.
One simple idea may be to buy small
Katsuobushi packages and sprinkle it on your favorite salad.