The announcement comes three months after the pacifist nation ended its self-imposed decades-long ban to export arms.
According to the news agency, the parts for the Patriot Advanced Capability-2 defense system that are no longer made by the original contractor and will now be supplied from Japanese factories.
In related news, defense officials said Tokyo is also expected to assume missile research links with counterparts in the United Kingdom.
AFP said the studies will focus on technology used in fighter jets.
âWe believe that we can create more sophisticated products by bringing together the finest technologies from both Britain and Japan,â an official was quoted as saying.