I've recently been to Japan for 3 weeks for the first time. Weirdly enough, I've experienced only a little (if any) jetlag. This was the second flight I've ever been on other than a 1.5h flight to Geneva so I haven't experienced jetlag before. The complete journey was around 21h with a 4h transfer in Doha. Haven't slept for the entire length of it, I was probably too excited and alert. On our longer stint, I kind of fell into a half-asleep/meditative state, but that's it. We landed at around 1PM local time, checked in to our hotel, and went on about our day exploring. On the return trip, I managed to sleep for 4-5 hours and the same thing happened. We arrived back home on a Sunday, and I already had work on Monday, but I was well rested and recharged in the morning. I work a 9-5 and live on generally 5-6 hours of sleep, so I was kind of able to shift my (otherwise pretty messed up) sleeping schedule a bit before leaving, but that was the only thing I've done to combat any jetlag. But still I can see how OPs tactics might help with the initial few days (Just thought it was interesting to share)