The country's northern bases will become a focus to deter adversaries and protect trade routes and communications, according to Australia's Defence Strategic Review.
Announcement comes after Pyongyang said earlier this week that it was ready to launch its first military spy satellite in defiance of the United Nations.
US Secretary of State Antony Blinken says any danger posed to American diplomats is unacceptable.
This marks the first time that all of G7 members have committed to the 2040 goal.
Kishida was visiting the Saikazaki port in Wakayama prefecture on Saturday to cheer his ruling party’s candidate in a local election on April 23.
Summit in the resort town of Karuizawa also comes amid concern that some European G7 leaders could be perceived as taking a weak stance over Beijing's threats over Taiwan.
The trilateral summit in Washington DC urged North Korea to stop its destabilising activities adding that Pyongyang's nuclear tests would be met with a strong response.
Draft must be aligned with Tokyo's goal of reaching a largely decarbonised power sector by 2035, comply with limiting global warming to 1.5C, and avoid emissions of nitrous oxide and other pollutants,
Taiwan says China would also impose a no-fly zone briefly on Sunday morning in a similar area that would affect around 33 flights.
Seoul says the missile was launched on a high angle near Pyongyang and fell in the waters between the Korean Peninsula and Japan following a 1,000-kilometer (620-mile) flight.
Two pilots, two mechanics and six crew members were on board the UH-60JA when it went missing on Thursday as it flew above waters off Miyako island in southern Okinawa.
Three allied countries accuse North Koreans working abroad of evading sanctions that allow them to bankroll Pyongyang's unlawful weapons programme and being involved in "malicious" cyber activities.
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