On the downside 177 is acting as short term support and any break below will drag the pair further down till 176.45/175.75
The pair's short term resistance is around 177.60 and any indicative break above would extend gains till 178/178.50.
Indicators (1 Hour chart)
(50) - Sell
(14) - Buy
Recommendation: Buy GBP/JPY around 177 SL 176.45, Targets 178.45.