Before the World Baseball Classic Group C game between Japan and Chinese Taipei, blockchain prediction market Polymarket showed a heavily one-sided market: 90.8% implied win probability for Japan and just 9.6% for Chinese Taipei. Reported trading volume on the market had reached $117,780, showing where participant conviction was concentrated ahead of first pitch.
Prediction market pricing points strongly toward Japan
On Polymarket, Japan shares were quoted at 90.8 cents while Chinese Taipei traded at 9.6 cents, matching the implied probabilities cited in the report. The gap was even wider than the pricing seen before Chinese Taipei's opener against Australia. In that earlier market, Australia was priced at 64% versus 36% for Chinese Taipei, and the game ended in a 0:3 loss for Chinese Taipei.
The source also cited BC.game, another blockchain-based platform, which listed odds of 6.04:1.07 for the Japan-Chinese Taipei matchup. That translated into an implied win probability of about 84.95% for Japan. The numbers differ across platforms, but both markets leaned clearly in the same direction.
Injuries and pitching usage weigh on expectations
The pricing gap was tied to the pregame situation described in the source material. Team captain Chen Chieh-Hsien was hit on the left hand by a 150.6 km/h fastball in the sixth inning of the opener and was diagnosed with a distal fracture of the left index finger. His hand was placed in a cast, and he was seen as unlikely to play. Li Hao-Yu had also been removed from the roster. The effect is straightforward: key personnel losses reduced lineup stability.
Pitching depth was another issue. Chinese Taipei had already used frontline arms including Hsu Jo-Hsi and Sun Yi-Lei in the first game, limiting flexibility for the Japan matchup, with Cheng Hao-Chun set to start. Japan, by contrast, was listed with Yoshinobu Yamamoto as starting pitcher, while the batting order included Shohei Ohtani, Kensuke Kondo, Seiya Suzuki, Masataka Yoshida, and Munetaka Murakami.
Only two group-stage advancement paths remain
After the 0:3 loss to Australia, the report said Chinese Taipei was left with only two realistic routes to advance. One scenario requires South Korea, Chinese Taipei, and Australia to all finish 2-2, with Chinese Taipei then needing a favorable runs-allowed differential, which would mean beating South Korea by a large margin. The other path is the harder one: defeating Japan, South Korea, and the Czech Republic to finish 3-1 and advance alongside Japan.
The source also noted that, under Taiwan's laws, putting money into prediction markets could raise gambling-related legal risks. It framed the article as reporting on market pricing and implied probabilities rather than offering any betting advice.