Yen opened the week higher against the dollar before losing the gains as the dollar regained footing, while traders await the Bank of Japan's policy meeting later this week.
USD/JPY rose to 110.82 from the opening of 110.56, with an intraday low at 110.49, and a high at 110.86.
Yen opened on a strong note as dollar suffers from the consequences of a US government shutdown, before recovering some losses ahead of a vital Congress vote in hopes of reversing the shutdown.
Investors also look forward to Bank of Japan's meeting this week, looking for clues on any explanations for the future of monetary policy after the bank cut bond purchases earlier this month.
BoJ Governor Kuroda gave a positive outlook for the economy and inflation, fueling speculation that the BoJ could exit the monetary stimulus program faster than expected, even though Kuroda asserted the program will carry on until inflation hits 2%.