Yataro Udon
Founded 1966. Yellow sign at Sankobashi intersection on Kokutai-doro. Veteran Hakata udon shop, open 24 hours on weekdays (closed Sun/holidays). Kombu and flying fish broth. Oden available too. 2-min walk from Tenjin-minami Station.
Reviews say 'I've been coming here for 20 years as my late-night last bite' and 'the nutty fragrance of goboten and the delicate balance of the broth is perfect.' Tabelog 3.60 with 941 reviews.