planning a trip to thailand and japan around aug or september! was wondering how is the weather like in thailand and japan. i want to pack light and if i need more clothing i could always buy at thailand cuz its super cheap out there! going to thailand first for a whole week then flying straight to japan and party out there for the weekend! what is there to do out in thailand and japan? i am gonna be in bangkok, thailand and then Tokyo, japan. is a carryon suitcase(20inch) enough for a week in thailand, i heard that its super hot and humid around that time of year.