Japanese government bonds traded in a narrow range on Friday, as investors adjusted positions ahead of the weekend, with attention on the potential timing of Bank of Japan policy tightening and the race to select the next prime minister. Short- and medium-dated JGB yields, which move inversely to prices, were flat to slightly lower following their rise to the highest levels since 2008 earlier this week. The pullback followed growing expectations that the BOJ could resume rate hikes as early as next month, after a more hawkish shift from officials at the policy meeting last week.