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Blue Jays slugger Kazuma Okamoto becomes fifth Japanese player to hit 30 home runs in a season
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Photo credit: Dennis Lee-Imagn Images
Tristan Morgan
Sep 10, 2026, 07:00 EDTUpdated: Sep 9, 2026, 20:17 EDT
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Kazuma Okamoto has spent his first Major League season rewriting record books, and on Tuesday night, he conquered yet another milestone, one that only four other Japanese-born players in history had ever reached.
Facing Athletics right-hander Jack Perkins at Sutter Health Park, the 30-year-old third baseman turned on a 2-1 cutter in the top of the second inning, sending it 387 feet into the left-field seats. The solo blast came immediately after teammate Josh Smith had put the Toronto Blue Jays ahead with a home run of his own, extending Toronto’s early lead to 2-0 while pushing Okamoto to the coveted 30-home run mark on the season.
With that single swing, Okamoto etched his name alongside a truly legendary group of power hitters. He became just the fifth player born in Japan to hit 30 or more home runs in a single Major League season. He joined Hideki Matsui, who opened the club in 2004 when he launched 31 home runs for the New York Yankees; Shohei Ohtani, who has accomplished the feat six times, including reaching the 30-homer threshold again this year; Seiya Suzuki, who joined the ranks last season with 32 homers for the Chicago Cubs; and Chicago White Sox rookie Munetaka Murakami, who accomplished the feat September 5.
Alongside Okamoto and Murakami, Cincinnati Reds rookie infielder Sal Stewart also clobbered his 30th home run of the campaign on August 29. Together, the trio has established this as the only season in Major League history where three separate rookies have each hit 30 or more home runs, in what has been one of the most impressive rookie classes in MLB history.
For Okamoto, Tuesday’s triumph was simply the latest entry in a summer full of record-breaking moments. He had already shattered the Blue Jays’ single-season rookie home run record, which was previously set by Eric Hinske during his 2002 American League Rookie of the Year campaign with 24. Now, Okamoto is on the brink of breaking another Blue Jays rookie record as he currently sits just three RBI away from tying Hinske’s 84.
Before arriving in Toronto, Okamoto spent 11 dominant seasons with the Yomiuri Giants of the Nippon Professional Baseball (NPB) in Japan, compiling a .277 batting average along with 248 home runs and 717 RBIs across 1,111 games. His tenure in NPB included six All-Star selections, three Central League home run titles, and a gold medal victory with Team Japan at the 2023 World Baseball Classic. Seeking a middle-of-the-order threat without breaking the bank, Toronto signed Kazuma Okamoto to a four-year, $60-million contract in January after the Giants posted him, paying an additional posting fee of nearly $10.9 million to secure his services.
Okamoto, in his rookie season, has undeniably been delivering immense power since making the leap across the Pacific, but is his production sustainable? Some underlying metrics suggest the answer is yes. His 13.5 percent barrel rate ranks in the 89th percentile leaguewide, while his 90.5 mph average exit velocity sits comfortably in the 74th percentile. Perhaps most telling is his expected slugging percentage of .442, which closely mirrors his actual .451 slugging mark, proving that good fortune has played an insignificant role in his production.
The primary trade-offs of Okamoto’s game-changing power have been contact quality and inconsistency. His 29.4 per cent strikeout rate resides in the 10th percentile leaguewide, and his whiff rate is even worse, ranking in the bottom seventh percentile. These swing-and-miss numbers explain why his rookie campaign has featured some pronounced peaks and valleys. 
Okamoto struggled out of the gate in 2026, hitting just .200 with three home runs over his first 100 big-league plate appearances. He then erupted in June to capture American League Rookie of the Month honours, smacking seven home runs while posting a stellar .889 OPS. Another mid-summer slump followed from mid-July into early August, dropping his average to .196 over that stretch, before he reignited once again in September with a .333 average and a 1.009 OPS through his first seven games of the month.
Through 140 games in his MLB career, Okamoto is batting .232/.306/.451 with 30 home runs and 83 RBIs. His home run output is more than double that of any other Blue Jays hitter, with George Springer standing second on the club with 14 home runs and Nathan Lukes trailing with 10. As Toronto fights to defend last year’s American League pennant in the midst of a tight Wild Card race, the third baseman imported from Tokyo has anchored himself as perhaps the most indispensable producer in the Toronto lineup.
In the end, Kazuma Okamoto’s debut season represents far more than might meet the eye. By adapting his power and approach to Major League pitching, any doubts about NPB-to-MLB transitions have certainly been put on the back burner. As the Blue Jays push toward a potential postseason berth, Okamoto’s bat staying hot is crucial to their playoff ambitions, and his rookie year should be remembered as a landmark moment for both the franchise and international baseball.
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