We present the analysis of the microlensing event OGLE-2016-BLG-1227 . The light curve of this short-duration event appears to be a single-lens event affected by severe finite-source effects . Analysis of the light curve based on single-lens single-source ( 1L1S ) modeling yields very small values of the event timescale , t _ { E } \sim 3.5 days , and the angular Einstein radius , \theta _ { E } \sim 0.009 mas , making the lens a candidate of a free-floating planet . Close inspection reveals that the 1L1S solution leaves small residuals with amplitude \Delta I \lesssim 0.03 mag . We find that the residuals are explained by the existence of an additional widely-separated heavier lens component , indicating that the lens is a wide-separation planetary system rather than a free-floating planet . From Bayesian analysis , it is estimated that the planet has a mass of M _ { p } = 0.79 ^ { +1.30 } _ { -0.39 } ~ { } M _ { J } and it is orbiting a low-mass host star with a mass of M _ { host } = 0.10 ^ { +0.17 } _ { -0.05 } ~ { } M _ { \odot } located with a projected separation of a _ { \perp } = 3.4 ^ { +2.1 } _ { -1.0 } au . The planetary system is located in the Galactic bulge with a line-of-sight separation from the source star of D _ { LS } = 1.21 ^ { +0.96 } _ { -0.63 } kpc . The event shows that there are a range of deviations in the signatures of host stars for apparently isolated planetary lensing events and that it is possible to identify a host even when a deviation is subtle .