I am heading to Vietnam and have two long layovers in Tokyo, Japan. The first layover is August 22nd in Haneda at 5:00am. I leave at 6:30pm the same day but out of Narita. The second layover is September 4th in Narita at 7:55am. I leave at midnight on September 5th out of Haneda. Was wondering what I should do/see? Where I can store my checked suitcase and carry-on suitcase?