[40-Year Japanese Government Bond Yield Surpasses 4% for the First Time Since Its Introduction in 2007] Odaily Planet Daily News: The 10-year Japanese government bond yield rose by 3.0 basis points to 2.3%, marking the highest level since February 1999. The 20-year Japanese government bond yield increased by 4.0 basis points to 3.295%. The 40-year Japanese government bond yield surpassed 4% for the first time since its introduction in 2007. (Jin10)