Japan wants to join the Rugby Championship but is also talking to the Six Nations about becoming part of the European competition.
The Jamie Joseph-coached Brave Blossoms made the World Cup quarter-finals on home soil in 2019 but have played very little in the past two years, mainly because of the pandemic.
Their chief executive Kensuke Iwabuchi said has had a "huge impact" on the team and Japan is desperate to relaunch its international aspirations.
"For our national teams to have not played for the best part of two years has had a huge impact. We definitely need to be involved in regular international competition, otherwise we cannot expect to maintain consistently strong sides," he said in an article on the Japanese Rugby Football Union website.
"Europe has the Six Nations and the Southern Hemisphere have the Rugby Championship. We are in discussions with both competitions, but while Japan is technically in the Northern Hemisphere, from a time-zone perspective we are closer to Australia, New Zealand and the Pacific nations, so it probably makes sense to connect with their competitions."