1. EGC Competition Monitoring Background
EGC publishes quarterly monitoring reports on voluntary initiatives and competition status. The 46th report covers Q4 2025, published March 30, 2026.
2. JEPX Spot Market HHI
JEPX spot market HHI remained in the moderately concentrated range in Q4 2025. Competition has improved significantly since 2016 liberalization, but major utilities still hold significant market power through large generation asset portfolios.
3. Area Market Segmentation
Key segmentation zones: Hokkaido-Honshu (North-Honshu interconnector limits), Chubu-Kansai (50/60Hz frequency boundary), Kyushu-Chugoku (reverse flow during renewable curtailment).
4. Policy Implications
Key policy directions: expanding inter-regional transmission capacity, further separating utilities' generation and retail divisions, and ensuring transparent carbon cost pass-through under GX-ETS.
