Japan’s 10-year government bond yield climbed to its highest level since 2008 on Tuesday amid concerns over fiscal spending ahead of upper house election on July 20. The 10-year rate rose 2.5 basis points to 1.595% while the 20-year yield climbed 3.5 basis points to 2.64% and 30-year yield rose 4 basis points to 3.195%, both their highest since 1999.