A new cultivar of Japanese haskap plant named ‘Willa’ that is characterized by its an upright and spreading plant habit, its moderately vigorous plant habit, its fruit that mature mid-season, its fruit that are attractive in appearance with and oval-round in shape with some having a small neck at the attachment, its fruit that are firm in texture, large in size with a pleasant, mild taste with a BRIX of 15°, and its fruit attachment to the peduncle that is medium in strength strong enough to prevent pre-harvest drop and yet loose enough to permit picking without tearing berry flesh.
