If you're looking for good ramen in Miyazaki, you may have to travel outside of the main city. Sure there's a few here or there within the city, but I was told one of the best is called Hibiki. Undeterred by the distance, I got in a friends car and just drove. Hibiki is now a chain ramen-ya with several locations outside of the country, but the original location is still very popular with the locals. The ramen here is tonkotsu-based with a hint of shoyu. In other words, it's good with a hint of great. The egg and the chashu are downright dreamy but unfortunately, the noodles are simply ordinary.
It's more than a bit far from any station. You're best bet is to go by car, although I still won't be able to tell you how I got there. Hopefully, the map below will help. They are closed on Wednesday's.
Other sites that mention Hibiki: