GBPJPY (weekly chart) has reached the 1.618 projection at around 182.48 but could very well move higher.
RSI is positive with no divergence suggesting a move to the 188.90 levels could be seen. Expect a correction on the way up, however.
188.90 is a fairly strong resistance level. It was the correction peak prior to the massive sell-off back in 2016 (monthly chart)
The current uptrend is so steep it is breaking above its upper trendline in the longer term rising channel pattern.
There is no RSI divergence on weekly and monthly indicating higher GBPJPY medium- to longer-term
Short-term a correction down to the lower trendline in the rising channel pattern could be seen. Possibly touching 178 before uptrend resumes. There is risk down to the 0.382 retracement at 176.67, however.
Keep an eye on Daily RSI which is likely to bounce off from its rising trendline.