Northern Kyūshū comprises all of Fukuoka (福岡), Ōita (大分) and Saga (佐賀) Prefectures, plus northern Nagasaki Prefecture (長崎県). For many visitors, it will be the first entry into Japan's southernmost island. Fukuoka is the largest city, yet still retains an appealing 'small town' feel. Beppu, on the east coast, is renowned for its hot springs, while to the west lie a number of lovely pottery towns and the historical gem of Hirado.
Get even a little bit away from an urban centre and you'll be surrounded by a patchwork of rice fields that can extend for miles. There's excellent hiking in the mountains, a coastline that's relatively untouched, and quiet rural towns and villages to explore.
While tourists have become more common in the past few decades, in outlying towns they're still something of a rarity, so expect a few stares and the occasional question.