  We present analyses of Suzaku XIS light curves and spectra of the BL Lac
object OJ 287 with observations positioned primarily around proposed recurrent
optical outbursts. The first two observations were performed in 2007 April 10 -
13 (epoch 1) and 2007 November 7 - 9 (epoch 2) that respectively correspond to
a low and a high optical state and which, within the binary supermassive black
hole model for OJ 287, precede and follow the impact flare. The last three
observations, made consecutively during 2015 May 3 - 9 (epoch 3), were during
the post-impact state of the 2013 disc impact and are the longest continuous
X-ray observation of OJ 287 taken before the optical outburst in 2015 December.
Intraday variability is found in both the soft (0.5 - 2 keV) and hard (2 - 10
keV) bands. The discrete correction function analysis of the light curves in
both bands peaks at zero lag during epochs 2 and 3, indicating that the
emission in both bands was cospatial and emitted from the same population of
leptons. Power spectral densities of all three light curves are red noise
dominated, with a rather wide range of power spectrum slopes. These X-ray
spectra are overall consistent with power-laws but with significantly different
spectral indices. In the 2015 observations the X-ray spectrum softens during
the flare, showing an obvious soft X-ray excess that was not evident in the
2007 observations. We discuss the implications of these observations on the
jet, the possible accretion disc, and the binary supermassive black hole model
proposed for the nearly periodic optical flaring of OJ 287.
