GBP/JPY tells you how many Japanese yen one British pound is worth. Traders nicknamed it "the dragon" — and sometimes "the beast" — because it moves fast and far. It combines a risk-sensitive currency (the pound) with a classic safe-haven and funding currency (the yen), so swings that would be modest in a major pair often look dramatic here.
The biggest driver is the gap between the two central banks. When the Bank of England holds interest rates well above the Bank of Japan's, the pound tends to attract buyers chasing yield, and GBP/JPY drifts higher. When that gap narrows — the BoE turning dovish, or the BoJ finally tightening — the pair can fall hard and quickly. Markets usually move ahead of the actual decisions, on expectations.
Risk appetite matters just as much. In calm, risk-on conditions the yen is often sold to fund higher-yielding trades, lifting the pair. When fear spikes — a market shock, a geopolitical flare-up — money rushes back into the yen as a safe haven, and GBP/JPY can drop sharply. That dual nature is why the pair is prized by experienced traders and treated with respect by everyone else.
It is most active during the London session and the London–New York overlap, when European and US desks are both live. The Tokyo session moves the yen leg and can set the tone overnight. Because daily ranges are wide, position sizing and a clear stop matter more here than almost anywhere else — which is exactly why Robin pairs every read with an entry, a stop and a target.