USD/JPY peaked at 138.75 on Thursday on the EBS, a new 2023 high

Spot has seen a drop from 138.74 in early Asia, to hit 137.98 in London

EBS flow data shows steady USD/JPY selling since NY trading on Thursday

Dealers suggest pre-weekend position adjustments, profit taking

Spot could see eventual big gains to probe a key Fibo at 139.58 nL1N37G0E1

EUR/JPY's 30/60-day log correlations are high, both well above +0.60