Trailing at half-time to Yuki Ohashi’s opener, John Mousinho’s men levelled on 62 minutes through Callum Lang’s first of the season, finishing off Josh Murphy’s cross.
Then, 11 minutes from time, Conor Chaplin’s right-wing corner was headed home by Bowat to secure a 2-1 triumph.
It was a priceless win for the Blues, lifting them into 21st - a point outside the relegation zone - and here are our player ratings…
9. Minhyeok Yang - 5
(Replaced by Colby Bishop on 46 mins) Kept the ball well and always looking to progress, but offered very little in an attacking sense down the right flank, creating barely anything. Photo: Graham Hunt
10. Conor Chaplin - 8
More like the Chaplin we know and love in his favoured number 10 position. Excellent energy, drive, used the ball well and always a threat. Also supplied the right-wing corner headed home by Bowat for the winner. Photo: Stephen Flynn
11. Josh Murphy - 8
Fired in the first shot of the game, with a seventh-minute attempt which drew a save out of Pears. Yet again, always Pompey’s best bet for creativity and it was his cross which supplied Lang’s equaliser. Captain in Pack’s absence. Photo: Graham Hunt
12. Callum Lang - 8
Started the match up front before switching to the right flank at the break, where he looked far more effective. Sure enough, Lang levelled on 62 minutes with a far-post finish for his first of the season. Photo: Graham Hunt