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This Fukuoka-born chain (since 1993) has a nationwide following. That's as much for its serving style as for its fresh noodles and 15-second kitchen-to-table rule. Customers fill out forms (available in English) requesting precisely how they want their noodles prepared: flavour strength, fat content, noodle tenderness, amount of special sauce and garlic, and eat at individual cubicles for zero distractions.
The corporate office/main location in Nakasu has two storeys: the upper floor has the signature individual booths, while the ground floor is more traditional, with sit-down tables and a bar. Look for the bright green-and-red awning.