Me trying to work 9am to 5pm with no naps was exactly this chapter. I was miserable every day. I did a sleep study recently... this is where you go to a strange place and they hook up electrodes to you and then tell you to sleep to determine if you're sleeping correctly. It was awful. I only actually slept for 4 hours. If you, like me and Tanaka, never feel rested after sleeping and nap a lot, maybe you have a sleep disorder. But I'm not sure finding out is worth the effort.