Tonchinkken
A venerable shop where a former French chef has served authentic Hakata tonkotsu ramen in Inazawa for 20+ years. The lunch special 'Hakata Ramen + gomoku rice for 600 yen' is one of the best values in Inazawa. Open until midnight. Counter seating only (16 seats). Google 3.9/129. Also a staple late-night ramen destination after local izakaya visits.
Reviews say 'you can eat authentic Hakata ramen here', '600 yen lunch is unbeatable value', 'lots of regulars, deeply rooted in the community'. Yahoo Maps 3.82/46.