Niwata, Noriaki
1927
Hoken keieigaku- Hoken ni okeru eigyōsei to fukushisei
- Hoken riron no tenkai
- Hokengaku
- Insurance
- Insurance, its principles and practice in Japan
- Kankyō henka to seimei hoken
- Kōreisha no seikatsu hoshō to nenkin mondai
- Shakai hoshō to kojin hoshō
- Shakai hoshō to Nihon no zento
- Shakai hoshō no kadai to zaisei
- Shin hokengaku