World Championship in Kyokushin (IKO). Tokyo, Japan, 3 January 1984.
Winners
- Makoto Nakamura — Japan
- Keiji Sanpei — Japan
- Akiyoshi Matsui — Japan
- Ademir Da Costa — Brazil
- Yasuto Onishi — Japan
- Nicholas Da Costa — Great Britain
- Keizo Tahara — Japan
- Dave Greaves — Great Britain
1/8 finals (top-16)
- Peter Collas — Australia
- Andy Hug — Switzerland
- James Kitamura — Brazil
- Gary Klugiewicz — USA
- Akira Masuda — Japan
- Toshio Mizoguchi — Japan
- Michael Soderkvist — Sweden
- Kenny Uttenyenbordt — South Africa