Fuel oil front-month contract closed at ¥3,999/t (+2.72%), the highest in three weeks; Brent rose 2.96% to $100.82/bbl. Dynamic import quota adjustments and customs clearance compressed to <48 hours have elevated evidentiary rigor for offshore re-sales. Per SNSUC platform data, compliance pass rate for fuel oil offshore documentation declined 5.3 pts MoM to 87.1% in early September.