Thursday ended at 179.29; during Friday's session GBP/JPY rallied above 181.86 for the first time in 7 years, gaining 256 pips and closing at 181.86.
Elsewhere, other currency pairs are also gaining ground as USD/JPY surges 1.12% Friday and closed at 140.26. EUR/JPY went up by 1.12% Friday, and closed at 155.22. GBP/NZD is trading around 2.0555 after ending Friday's session at 2.0492 (up 0.31% today).
The currency pair has been trending positively for about a month. The past 3 months have been positive for Pound-Yen as it added 10.48% compared to its 3-month low of 144.6.