<p>Having lived in Kyushu, I can say that there is a very good reason to sleep in a bed.</p>
<p>Mukade (centipedes.)</p>
<p>Those suckers LOVE futon. I'll gladly trade back pain for mukade free sleep. The first time I woke up with one crawling on me in my futon, I decided to stick with a Western-style bed.</p>