Oh yes, of course.
Ramen basically has four components: stock, seasoning, noodles, and garnish. You put them in the bowl in that order.
The seasoning mix is usually mostly soy, sometimes with miso, often some sesame oil. The base flavor changes significantly depending on the proportions and quantities, refracted by the stock. So shoyu-ramen is basically shoyu and a bit of oil with a very clear chicken-pork stock. Miso-ramen is mostly saikyo-miso, with a bit of shoyu and oil, and usually a straightforward pork stock. Tonkotsu ramen relies heavily on this weird stock (which the Chinese sometimes call "milk stock"), and it's usual to have the seasonings be relatively light, just there to give depth and bring the stock flavor forward.
If you're going to be in Fukuoka, just make sure that you pick ramen places where you can sit right up at the bar and watch them make it. Ask them what they're putting in the seasoning mix, too: normally they just splash about X much of this, Y of that, etc. into the ladle, then pour it onto the stock in the bowl. Add noodles, and then garnish.
Garnishes, well, after your visit to Fukuoka, you'll have better information than I. That gets very individual by shop: this place is big on just-done eggs, this place does pickled ginger, this place does a special thing with nori, and so on. Always order the shop's special tonkotsu ramen, by the way: you don't want standard, you want what they think is cool. The stock and seasonings and noodles probably won't change a whit -- it's all about the garnishes.
If you're planning to eat a lot of this, take it easy on the soup, okay? I want to hear what you learned before you have a heart attack. :p