tokyo march 8 reuters  japanese government bond yields rose on tuesday tracking overnight us treasury yields higher as a surge in energy prices following the russiaukraine conflict stoked concerns of broadening inflationary risks the 10year jgb yield rose 15 basis points to 0155 and the 20year jgb yield jumped three basis points to 0640 oil prices have hit 14year highs and russia warned that prices could surge to 300 a barrel and it might close the main gas pipeline to germany if the west halts oil imports over the invasion of ukraine the benchmark us 10year treasury yield rose slightly overnight after touching its lowest level in two months the 30year jgb yield rose four basis points to 0865 after touching onemonth low in the previous session the yields rose also after an auction for fiveyear japanese government bonds witnessed moderately firm demand with bids worth 329 times the amount sold lower than a ratio of 339 times at the previous auction the twoyear jgb yield rose 05 basis point to minus 0050 and the fiveyear yield climbed one basis point to minus 0005 benchmark 10year jgb futures fell 017 point to 15092 with a trading volume of 19709 lots