I love japanese food. Sweet-spicy can be ok, but even in japanese I prefer the soy flavors (like many udon dishes or sushi) than some of the sweeter profiles (like sweetned soy often used with fried tofu).
Also I suspect you are in europe, somewhere nordic or nearby, perhaps dutch or german? Because in that region asian food, specifically japanese, is uncharacteristically sweet. In the USA and in japan itself it is less commonly sweet.