Originally Posted by
gijoe24jp
On the other hand, DO NOT attempt to transit between HND and NRT unless you have been to Japan and know where you're going and have plenty of time.
Apart from being time consuming, and a bit annoying waste of time, there is nothing difficult about the transfer. There are busses from terminal door to terminal door running every 15 minutes throughout the day.
That being said, due to the time taken, I would recommend to go for a same airport connection just for the time.