Kata Kunci Pencarian:
- Polonium
- Bunuh diri
- Plutonium
- Japanese Federation of Chemical Workers' Unions
- Japanese Federation of Chemical Industry Workers' Unions
- Japanese Federation of Chemical and General Workers' Unions
- Japanese Federation of Chemistry Workers' Unions
- Japanese Federation of Textile, Chemical, Food, Commercial, Service and General Workers' Unions
- Zensendomei
- Japanese Federation of Textile, Chemical, Commerce, Food and General Services Workers' Unions
- Japanese Federation of Chemical, Service and General Trade Unions
- Japan Federation of Textile and Clothing Workers' Unions
- Japan Federation of Service and Distributive Workers' Unions
