Oneworld alliance carrier Finnair is to open services to Tokyo Haneda, complementing operations to the Japanese capital's Narita airport.
Finnair says the new operation will be daily, subject to slot availability, and will commence at the beginning of the summer 2020 season.
The carrier operates Airbus 350-900s on the Narita route, which it flies twice-daily.
But Finnair indicates that Narita will become a daily operation next summer. Its reservations system suggests the second Narita flight will switch instead to a Haneda service.
Finnair chief commercial officer Ole Orver maintains that the carrier still has a "strong commitment" to Narita.
Its Oneworld partner Japan Airlines also operates daily on the Narita-Helsinki route.
Tokyo Haneda airport is "conveniently located" in the centre of the city, Finnair points out, and the new service will codeshare with JAL.
Finnair already serves three other cities in Japan – Osaka, Nagoya and Fukuoka – and is to open a link to Sapporo in mid-December.