Please be aware that Taipei and Tokyo has multiple airports and that these results are for all airports serving the city.
The best month to fly between Taipei and Tokyo is June and the most expensive month to fly is January. (Average prices, based on 1437 datapoints.)
The best day to arrive at Taipei is Sunday and it would be best to avoid Wednesday, as prices are on average 19.31% higher than on Sunday. (Average prices, based on 1441 datapoints.)
The cheapest airline flying from Taipei to Tokyo is Tigerair Taiwan. They are 55% cheaper than China Airlines. (Average prices, based on 1445 datapoints.)
The best time to fly is at around 6. (Average prices, based on 1570 datapoints.)