All Nippon Airways (ANA) plans to launch new domestic services and raise the frequencies of a number of services from 31 March.
It will launch twice daily Akita-Sapporo and daily Tokyo Narita-Hiroshima services, and resume its daily Tokyo Haneda-Ishigaki, Nagasaki-Okinawa and Kumamoto-Okinawa services, says the carrier.
The Star Alliance member will raise frequencies of 10 domestic services from Tokyo, Osaka and Nagoya.
It will add a daily service on routes from Tokyo Haneda to Hakodate, Komatsu and Sapporo, increasing their frequencies to thrice, six and 18 times daily respectively.
Its services on routes from Osaka Itami to Kagoshima and Fukuoka will increase to six and ten times daily, while the Nagoya-Sendai service will increase to five times daily.
It will also add two daily services on routes from Osaka Itami to Miyazaki and Sendai, while its Tokyo Narita-Sendai and Fukuoka-Komatsu frequencies will be doubled to twice and four times daily respectively.
ANA, however, plans to suspend a service and reduce frequencies on several routes, starting 31 March.
The airline will reduce the frequency of its routes from Osaka Itami to Matsuyama and Kochi to nine and six times daily.
Its Okinawa-Ishigaki and Kobe-Sapporo services will also be reduced to eight times daily and daily respectively.
ANA's thrice daily Kobe-Okinawa service, meanwhile, will be suspended on 1 June, adds the airline.