1984 Tokyo Indoor – Singles

Ivan Lendl was the defending champion.

Jimmy Connors won the tournament, beating Lendl in the final, 6–4, 3–6, 6–0.

Seeds

 * 1) 🇺🇸 Jimmy Connors (champion)
 * 2)  Ivan Lendl (final)
 * 3) 🇸🇪 Mats Wilander (quarterfinals)
 * 4) 🇪🇨 Andrés Gómez (semifinals)
 * 5) 🇸🇪 Anders Järryd (first round)
 * 6)  Tomáš Šmíd (first round)
 * 7) 🇺🇸 Scott Davis (first round)
 * 8) 🇺🇸 Brad Gilbert (first round)