Japan’s Skymark Airlines have announced plans to add up to 12 737 MAX airplanes as part of its fleet modernisation efforts, Boeing said in a statement.

The low-fare carrier intends to order four airplanes including the 737-8 and 737-10 variants with options for two additional jets. Separately, the airline will add six lessor-owned 737-8s to its fleet.

Based in Tokyo’s Haneda Airport, Skymark Airlines is Japan’s third largest carrier by revenue and currently operates an all-Boeing fleet of 29 Next-Generation 737-800s.

“As Skymark Airlines looks to sustainably grow its fleet, the 737 MAX family offers market-leading efficiency and environmental performance,” said Ihssane Mounir, Boeing’s senior vice president of Commercial Sales and Marketing. “With commonality and enhanced capabilities, the 737-8 and 737-10 will enable Skymark Airlines to optimize its fleet across all operations.”