Since if its the same airline you should be fine as you dont need to check out/in. Furthermore 2 hours is more than enough. I have done numerous connecting flights (though not with VN) that are about an hour apart. Normally if there is a slight delay, there will be staff waiting for you at the gate to rush you to the connecting flight. However if you are really one of the unlucky ones, better check with VN what's next.

Don't have to worry. It's just a short transit via the same Airline. So even if your arrival to Hanoi is late, the flight to Osaka will wait (unless delayed by too long).

And yes, like sacwoc mentioned - you don't have to check in/ out from the immigration. I believe VN will require you to stopover at the Transit Counter to check-in after you've arrived in Hanoi.

price cheaper compare to airasia?

I took the same VN flight time in Dec 17. The only q needed is through carry-on bag scanner (your shoes too).
Do not worry, 2-3 hours manageable. Still have time for burger or a smoke... 

My experience reaching Osaka at 6.40am. Need to wait HIS counter open at 8:30am for sim card or ticket collection ordered from Klook.
Took a bus (200yen) to Rinku premium outlet, snack shop at Supercenter Trial to kill time before 3pm Airbnb check-in. Feels sleepy since night flight.

SIC Zao Onsen Skiing Video (only concentrating on the skiing)


July/August is hot and humid, not very pleasant months to travel BUT there are quite a few summer festivals (and also summer is peach season, and Japanese peaches = LOVE).
September a bit cooler but it's a bit "in between" seasons -- I'd prefer if you can to push to October and go Hokkaido, or November and go Kyoto/Osaka, for the autumn leaves scenery.

July is fireworks festival, but gonna be hot and humid

if you're going to bring your daughter, please keep her quiet on the plane

should no problem if 2 transit station
narita to ueno (skyliner train)
ueno to ueno-okachimachi (line G, just one station, change line E)
ueno-okachimachi to ryogoku (line E)

if it’s already stated clearly then it’s free

take a screenshot just in case for proof

children also got >5 years old mah

it's basic fare + supplement fee of 410yen. so total fare is about 1400yen compare to 2200yen for Skyliner Limited Express