Originally Posted by
Row3Acer
You need not to use award ticket between TPE and NRT. You are permitted to have 1 stopover in either one of the legs for this route. You could either stopover NRT for a few days inbound or outbound and visit you gf in tokyo...
While this is possible, often the fare is subject to a "HIP" (higher intermediate point) check. Of course, if the OP is buying a ticket to Tokyo anyway, then yes, this could be the same price since often the TPE fares are cheaper than the Tokyo ones.