Keisei Tominaga dropped a game-high 17 points Sunday as Japan dominated Taiwan 89-49 in the opening round of Asian qualifying for the 2023 FIBA Basketball World Cup.

The 21-year-old guard for the University of Nebraska Omaha got into the teeth of the defense and was a perfect 5-from-5 from the stripe in his 15 minutes off the bench at Melbourne's John Cain Arena.

Keisei Tominaga of Japan in action during a FIBA World Cup Asian qualifier match against Chinese Taipei at John Cain Arena on July 3, 2022 in Melbourne, Australia. (Getty/Kyodo)

Soichiro Inoue contributed 14 points and Luke Evans 13 for the Akatsuki Five, who improved to 2-4 in group play and ended winless Taiwan's bid to reach the next qualification round.

Japan, Indonesia and the Philippines have automatically qualified as co-hosts of the World Cup, tipping off Aug. 25 next year.

With NBA forwards Rui Hachimura and Yuta Watanabe temporarily out of the picture, Japan's head coach Tom Hovasse picked a squad with relatively little senior national team experience for the qualifiers in Australia.

While Japan was resoundingly beaten 98-52 by Australia on Friday, Tominaga's 18-point performance against the Tokyo Olympic bronze medalist in his senior international debut put a silver lining on the loss.