What are these things?

Just got some tonkatsu from a ramen place near me (order from there all the time too) and there were tons of these brown, noodle-esque things in there for the first time. They taste fine and there’s a nice little crunch to them, but I have no idea what they are.

Just got some tonkatsu from a ramen place near me (order from there all the time too) and there were tons of these brown, noodle-esque things in there for the first time. They taste fine and there’s a nice little crunch to them, but I have no idea what they are.