While ramen is absolutely a Japanese dish, it was introduced by Chinese immigrants who brought their noodle making technique ! Noodles can vary but traditionally seems to be the unique texture of noodles made with 'alkaline water'. Ramen noodles are firmer with more 'bite' to them making them ideal for easy slurping without the noodles breaking

Not to be confused with Pho which is distinctly a Vietnamese dish with clear broth and flat rice noodles, also delicious but really only similar at first glance, ramen has heartier toppings and the ramen noodles are more substantial. Pho noodles tend to be more cooked, silky with delicate texture.

Please be sure to try both to find their similarities and differences, you are sure to enjoy both, but may prefer one.
I bid you long life and safe passage.