Japan dropped seven places to 56th in the world according to the latest FIFA rankings released on Thursday.
After losing to the United Arab Emirates at home on Sept. 1 to start the final round of World Cup qualifying, Japan is now the sixth-highest ranked team in Asia after Iran (37), Australia (45), South Korea (47), Uzbekistan (49) and Saudi Arabia (52).
Vahid Halilhodzic's side resumes final qualifiers for the 2018 World Cup in Russia on Oct. 6 at home to Iraq before traveling to Melbourne to face Australia five days later.
Also on Thursday, the Japan Football Association said the men's Rio Olympic coach Makoto Teguramori will rejoin the coaching staff of the full national side.
Teguramori had vacated his assistant coaching role last October to focus on the Olympics.