On August 1, 1952, a new was formed to supervise the NPR and its maritime component. The new agency was directly headed by Prime Minister Shigeru Yoshida. Yoshida supported its constitutionality: although he stated in a 1952 Diet committee session that "to maintain war potential, even for the purpose of self-defense, necessitate revision of the Constitution". He later responded to the JSP's constitutionality claims by stating that the NSF had no true war potential in the modern era. In 1954, the National Safety Agency became the Japan Defense Agency (now Ministry of Defense), and the National Police Reserve became the .