The Kenkokukai (建国会/建國會, National Foundation Society) was a Japanese secret society founded by Bin Akao in April 1926. It was an anti-communist organisation, strongly influenced by the National Socialism of Motoyuki Takabatake.
The predecessor of this association was the steering committee for the National Foundation Festival (建国祭), which was organized in opposition to May Day. It proclaimed its object to be "the creation of a genuine people's state based on unanimity between the people and the emperor".[1] At its height, the organization reached a nationwide membership of around 120,000.