According to Yukio Okamoto, a former diplomat, “We Japanese people should be proud of the path we have followed as a world-acclaimed peaceful nation under Article 9 of the Constitution. However, the reason why we have managed to get by without being attacked by other countries despite our low level of defense spending is not because of Article 9 but because of the defense system under the Japan-U.S. Security Treaty.” There is no guarantee that this deterrent system can be maintained into the future. It is necessary to develop realistic security policies that take into account the environment we are in.