Japan's government bond yields climbed across the curve Friday as elevated oil prices stoked inflation worries rippling through global debt markets. The selloff reflects broader unease that higher energy costs could erode the purchasing power of fixed-income investors worldwide, with Japan's sovereign debt among the hardest hit.

Investors sold Japanese government bonds as oil prices climbed, pushing yields to multi-year highs. Rising inflation expectations have rattled bond markets globally, and Japan's debt market hasn't escaped the pressure. The yield curve steepening signals investors demanding higher compensation for holding longer-dated debt.

For Japanese institutions holding large positions in government bonds, the yield move translates into real losses on their portfolios. Central bank intervention remains uncertain as inflation fears override traditional demand for safe-haven assets. Rising oil prices have become the catalyst for a broader repricing of fixed-income risk.