Title: Dragonball Z: Dead Zone/The World's Strongest. In 'Dead Zone' (1989) Goku (voice of Masako Nozawa) is out fishing when he has a sense of impending doom. In 'The World's Strongest' (1990), Gohan and Oolong (Naoki Tatsuta) set out to search for the missing dragon balls which are mysteriously being gathered together.
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