Japan's day‑ahead spot power prices reached a near four‑year high on Monday as
elevated fuel costs and planned maintenance cut generation. JEPX data show the
national spot price rose over 25% week‑on‑week to JPY31.15 per kWh (~$0.19).
Regional moves: Tokyo +19% week‑on‑week, Kansai +61%, Chubu +19%.