Japan trip? We leave the following week after PA’s cat show? Leave Saturday Morning for a week, back maybe the next Sunday?
Attached is some tentative planning and some cost estimate stuff
Leaving on 8th Nov (Sat), there is one flight that makes the most sense leaving early in the morning:
Return flight:
Assuming flying in and out of NRT:
Best one I found is via Jetstar. Flying to Kyoto istead of Osaka yields same price.
So estimated cost so far is ~10.7mil VND assuming these flights.
Doing some research for flights a few days before or after is showing that the SGN-NRT connection currently likely to be the lowest right now: