Chocolate vine, Akebia quinata
This plant prefers partial shade but succeeds in full sun and also succeeds on north facing walls.
The plants are fast growing and can be invasive.
Dormant plants are hardy to about -20°c but they can be somewhat tender when young. The young growth in spring, even on mature plants, is frost-tender and so it is best to grow the plants in a position sheltered from the early morning sun.
These plants are shy to fruit, they possibly require some protection in the flowering season, hand pollination is advisable.
Akebia plants are probably self-sterile, if possible at least 2 plants should be grown, each from a different source.
The fruit is edible raw. The fruit has a delicate flavour and a soft, juicy texture. Lemon juice is sometimes added to the fruit to enhance the flavour. 
The bitter skin of the fruit is fried and eaten. The fruit is 5 - 10cm long and up to 4m wide.
Soft young shoots are used in salads or pickled.
The leaves are used as a tea substitute.
The stems are taken internally, it controls bacterial and fungal infections and is used in the treatment of urinary tract infections, lack of menstruation, to improve lactation etc. The stems are harvested in the autumn and dried for later use. (see also pfaf.org)
The fruit is a popular remedy for cancer.
The peeled stems are very pliable and can be used in basket making.