Gamba Osaka surpassed all expectations by winning the treble last season, but manager Kenta Hasegawa believes there is still room for improvement in 2015.

Gamba returned to the top flight last year after a season in the second division, but their stay among the elite looked set to be short-lived when the club found itself in the relegation zone as the league shut down for the World Cup.

When play resumed in July, however, something suddenly clicked. Gamba put together an astonishing run of results that ended with captain Yasuhito Endo lifting the league trophy, and success in both the Nabisco Cup and Emperor's Cup crowned an unforgettable season.