The calculated distance (air line) between Tanushimarumachi-toyoki and Dazaifu is approximately 15 miles respectively 23 kilometers.
By car or train, the actual journey to Dazaifu is certainly longer, as only the direct route (as the crow flies) between Tanushimarumachi-toyoki and Dazaifu has been calculated here.
Air line (approximately)
23 kilometers
13 nautical miles