Sphère de coprospérité de la grande Asie orientale
Wataru strongly believed British rule had introduced a hedonistic and materialistic way of life to the indigenous people. He considered that they needed to be taught to endure hardship with physical and spiritual training and education. Wataru also believed that they must also be ready to give their lives if necessary to establish Hakkō ichiu (the whole world under one roof) and the Greater East Asia Co-Prosperity Sphere.