Harlequin Air Co., Ltd. (ハーレクィンエア, Hārekuin Ea) was an airline with its headquarters on the grounds of Fukuoka Airport in Hakata-ku, Fukuoka, Japan.[1][2] It was owned by Japan Air System (later Japan Airlines Domestic in 2004), operating domestic passenger services.
Scheduled flights were wholly sold by Japan Airlines, therefore no ticket carried JH. Essentially, Japan Airlines wet leased them.