Oda Eichiros's and Toriyama Akira's Interview (We've excluded the first part as it only talks about how they write etc.)
Oda: While I work, I only sleep 2 hours per day. And it's not 2 hours as a whole but 15min for few times. (Laugh)
Toritama: Yes, I know this feeling! I had a time when I only slept 20 min in total for 6 days! I almost died from it! (Laugh)
Oda: I think it might be better to sleep longer to make the process faster!
Toriyama: Yes, that's actually right! Have you ever experienced yourself sleeping but still making the draft for the story?
Oda: Haha that never happened but I had times where I almost fall asleep but still continued drawing the story. I had times where Luffy wore Nami's cloth and Luff had Nami's boobs, I was surprised when I saw that! (LoL)
Toriyama: I see. I actually had those type of experiences. I once woke up and then I have drawn things that I couldn't' believe. This was very time consuming as I had to fix additional things and thought that it might have been better to go to Bed.(Laugh)
Oda: I understand that. Fixing things is really time consuming and very annoying to do!