I am considering flying SFO-NRT-BKK in November. The outbound leg is no problem because I am staying a week in Tokyo before flying to Bangkok. However, the return trip would be flying BKK-NRT on ANA and NRT-SFO on UA with a 1 hr layover in NRT. Is this enough time between flights? Also, will ANA transfer my luggage to the UA plane? The reason for using ANA is because UA doesn't have many flights between BKK and NRT.