on the back of
～を背景に、～の影響で、as a result of it
- The sales of pencils in Britain are reported to have risen 700 per cent on the back of the Sudoku boom.
- The company has achieved record profits on the back of cheap labor.
- 引用元 : Financial Times (by Kana Inagaki and Anna Nicolaou) - Walmart partners with Japanese etailer Rakuten to take on Amazon (2018/01)
... Japanese online grocery delivery market, which is expected to grow rapidly on the back of an expanding female workforce and ageing population.