All Nippon Airways has ordered three more Boeing 777-300ER aircraft in an order worth £622 million at list prices.
The deal will increase the total number of 777s in ANA's fleet to 57 planes.
Shinichiro Ito, president and CEO of ANA Holdings, said: "The addition of three new Boeing 777-300ER aircraft will further strengthen ANA Group's long-haul network.
"The acquisition of our new 777-300ER airplanes will allow us to capitalize on the expansion of airport slots in the Tokyo area."
ANA is the launch, and largest commercial, customer for the B787 Dreamliner.
Ray Conner, president and CEO of Boeing Commercial Airplanes, said: "We are honored to have ANA validate the economics and reliability of the 777 once again.
"The 777-300ER has proved to be a perfect fit for ANA's network expansion and will provide added flexibility and strategic advantage as slots continue to open up in the market."
Earlier this week, Business Traveller reported on how ANA is to roll out enhanced and new in-flight services from September (see online news, July 29).