TS, i was in your position prior, the AD playing long con game. Dont fall for it. Try your luck travelling overseas airport AD than the 'local AD'.
If you got morning flight out from Haneda, the AD there dont hog stock. What you see, you can buy. Morning, because first come first serve. Gambatte

Bought 126331 at RRP. I think better luck on weekday. Gonna travel to US end July and do JP stop-over. Try my luck.