On the downside 177.50 is acting as short term support and any break below will drag the pair further down till 177/175.80.
The pair’s short term resistance is around 179 and any indicative break above would extend gains till 179.50/180.25.
Indicators (1 Hour chart)
(50) - Sell
(14) - Buy
Recommendation: Sell GBP/JPY around 178, SL 179.10, Targets 177/175.85.