Japan Airlines (JAL) will double its services on the Tokyo-Singapore route to 14 times weekly, starting 28 October.
It will operate Boeing 787-8s on the route.
The carrier will increase its services on the Tokyo-New Delhi route from five to seven times weekly from 29 October, employing Boeing 777-200ER aircraft.
From mid-2013, it will also increase its Tokyo-Helsinki service from four times weekly to daily.
The carrier will use 767-300ERs instead of 737-800s on its Tokyo-Beijing, Tokyo-Shanghai and Chubu-Shanghai services. The airline will also employ 737-800s instead of 767-300ERs on the Tokyo-Taipei route. Both changes will take effect from 28 October.
Additionally, starting 1 October, the carrier will increase the frequency of its Fukuoka-Miyazaki flights from nine to 10 times weekly and lower the frequency of its thrice weekly Fukuoka-Kagoshima service to twice weekly.
The airline will also operate 13 weekly flights on the Haneda-Okinawa Naha route from 28 October, down from 14 times a week.