What is the relationship between 'AirAsia' and 'AirAsia Japan' in the context of the input sentence.
Options: currency, chairperson, business division, director/manager

AirAsia plans to restart services to Japan in 2016 after its revamped low-cost carrier (LCC) subsidiary AirAsia Japan returns to the market following the 2013 collapse of a joint venture with All Nippon Airways (ANA).
business division