After meeting high-level US officials, Japan's Senior Vice Defence Minister, Akihisa Nagashima, told Japanese media in Washington on Friday that the two countries had "agreed to deepen Japan-US strategic consultations".
Mr Nagashima said the two countries were oriented "in the same direction" on Tokyo's proposal to revise guidelines on Japan-US defence cooperation, which were introduced in 1997 with a focus on possible conflict on the Korean peninsula.
Mr Nagashima was speaking after separate meetings with US Deputy Defence Secretary, Ashton Carter, and Assistant Secretary of State for East Asian and Pacific Affairs, Kurt Campbell.
In Washington the two sides confirmed they would discuss reviewing their defence roles in the face of China's military build-up and its naval expansion, formulating joint plans and promoting joint use of defence bases, Mr Nagashima was quoted as saying.
He said the US had assured him that the Obama administration's focus on Asia would only increase during its second term.
Japan's Defence Minister, Satoshi Morimoto, said in Tokyo on Friday that Japan had been proposing to Washington that talks on the guidelines be launched this year.
"The present guidelines were produced when the Korean peninsula was in a tense situation," he said, recalling a crisis heightened by North Korea's nuclear arms and missile development.
"But the East Asian situation is not limited to the Korean peninsula and there is also the issue of China going to the ocean.
Mr Morimoto said the alliance needed to be reviewed due to changes in security risks over the past 15 years.
"After 15 years, there are risks concerning terrorism, outer space, cyberspace, maritime stability and territorial issues," he said.
The recent deployment of US marine corps Osprey transport planes, perceived as unsafe by residents, has heightened anti-US military sentiment on the strategically-vital islands of Okinawa.
The problem has been compounded by the alleged rape of a local woman by two US servicemen and the claimed assault of a schoolboy by another.
Mr Nagashima said US officials had apologised at the Washington meeting for the repeated acts of violence.