The Boston Red Sox enter the offseason with a clear need for additions to the lineup. In an otherwise weak free-agent class, could the Red Sox look to top international free agent, Japanese corner infielder/outfielder Teruaki Sato, to add much-needed thump to the lineup? 

The 27-year-old has spent the last six seasons with the Hanshin Tigers of Nippon Professional Baseball, earning All-Star selections in five of those six years. After winning the Most Valuable Player Award in 2025, Sato made a strong case for back-to-back MVP seasons in 2026. In 143 games, Sato hit .306/.383/.609/.991, led the league with 40 doubles, 39 doubles, and 106 runs driven in.  

Sato has some concerns, though, as he struck out at a 26.7 percent rate in 2026, the third-highest in the NPB. However, an 11.1 percent walk rate offset that somewhat; it was the ninth-highest in the sport. 

Defensively, Sato profiles as a corner infielder or outfielder, spending the majority of his time in 2026 at third base and in right field. However, as noted by Just Baseball, he is expected to be a net negative defensively. 

Sato played for Team Japan in the 2026 World Baseball Classic, hitting second behind four-time MVP Shohei Ohtani. In five games, Sato hit .300/.417/.600/1.017 with three doubles, including one off Red Sox starter Ranger Suarez. 

Over his six-year career in the NPB, Sato posted a slash line of .271/.337/.514/.851 with 163 home runs, 185 doubles, and 518 RBI. 

Hanshin posted Sato on Monday, giving him 45 days to sign with an MLB team. However, his market could develop quickly with the lockout looming on Dec. 1. According to the Japanese media outlet Sports Hochi, the Seattle Mariners, Toronto Blue Jays, New York Yankees, San Francisco Giants, Los Angeles Dodgers, New York Mets, and Philadelphia Phillies are among the teams interested in Sato. 

While it's unclear what exact terms Sato is looking for, the two biggest Japanese free agents from 2025 can offer a sense of what's possible. Third baseman Kazuma Okamoto signed a four-year, $60-million deal with the Toronto Blue Jays. First baseman Munetaka Murakami inked a two-year, $34-million deal with the Chicago White Sox. 

Sato is projected to have a worse power tool than Murakami but a better hit tool, while he has more power than Okamoto but worse contact. Given that Sato profiles as somewhere between Okamoto and Murakami, a deal that pays him in the $16 million AAV range seems like an easy projection. However, it is worth noting that both Murakami and Okamoto signed deals that were lower than initial projections. Could their rookie-season success make teams more likely to splurge on Sato? 

With $268 million already committed to the 2027 roster, it's unclear how much the Red Sox will spend in free agency without first clearing out some money, whether through trades or non-tenders. However, the Red Sox are one of the few teams that wouldn't have to worry about Sato's defensive weaknesses, since they need a consistent designated hitter. 

While Sato is less of a proven commodity than some other free-agent bats like Randy Arozarena, Brandon Lowe, or Seiya Suzuki, he will likely command a smaller deal, giving the Red Sox a cheaper and younger option to add a big bat in free agency. 

Sato will begin negotiating with teams when free agency begins five days after the World Series ends and will have to sign with a team by Dec. 3.