Is Japanese Superstar Munetaka Murakami A Potential Fit With The Blue Jays?

[Simon Li]

Munetaka Murakami is a powerhouse slugger who has broken homer records in a dead-ball era and was posted by his NPB team, the Tokyo Yakult Swallows, and will have 45 days to sign with an MLB team. Murakami will be 26 years old in the 2026 season, which makes it more likely he will get a longer-term deal, as he has not yet reached his physical prime. 

Murakami’s calling card is obvious; he absolutely demolishes baseballs. In seven NPB seasons, he hit 246 homers, including a shortened 2025 season where he was shelved early with an oblique injury in March. Murakami’s best season came in 2022, when he broke the record for most home runs by a Japanese-born player with 56, posting a 225 wRC+. He walked over 19% of the time and struck out a little over 20% of the time; however, it was below average, only within the 25th percentile, as NPB hitters typically strike out much less. After that season, a pressure-filled WBC tournament got the better of Murakami, where he notably struggled to live up to his vaunted 2022 season, which carried over into the next two seasons. The prodigious slugger’s low water mark for ISO (Isolated Power) was .228 in 2024, which was a “down” year for him as he “only” had a 156 wRC+. His strikeout rate ballooned from during that stretch to nearly 30%. On a rate basis, when healthy, Murakami was remarkably similar in 2025, but his strikeout rate continued to hover above 28% which was the bottom third percentile. Although he strikes out a ton, his plate discipline is firm, with an above-average chase rate and a 99th percentile walk rate. 

His strengths are glaring, but so are his weaknesses. As we saw, his strikeout rate was one of the worst in NPB, and that is more concerning given that he’s coming to MLB, where pitchers throw harder and have more advanced stuff overall. Murakami also struggled heavily with “velocity,” as James Schiano noted, “Murakami had a .095 batting average against pitches 93 MPH or harder last season in NPB.” Of course, that’s still a small sample, as NPB doesn't have many pitchers who throw that hard, but adding in Murakami’s contact issues and strikeout concerns will give teams pause in how they evaluate his ability to hit MLB pitchers, where the average fastball velocity clears 94 mph. His contact issues cannot be overblown either, as his contact rate of 63.9% and Swinging Strike Rate of 17.3% would be the worst among all qualified hitters in MLB.

In addition to the concerns on the offensive end, Murakami also has significant concerns on the defensive end. He was a third baseman with the Swallows, but had a -8.4 Total Zone Rating (position adjusted), which was significantly below average. If the Jays were to sign him, his positional fit would immediately come into question, as the Blue Jays value defense quite highly, and Vladimir Guerrero Jr. also occupies first base for the next 13 years. George Springer and Anthony Santander are also more likely to fill the designated hitter role in 2026, which means that Murakami will be forced to play mostly at third base. 

The Jays will do their due diligence and check in on Murakami as a free-agent target. Still, concerns about his offensive game will be a significant problem for a team trying to compete for a World Series title, as they may not have the time to let him figure out major league pitching. Although he does have 70 grade power that most teams would love, the margins of error are very slim for him, as evidenced by Joey Gallo, who went from a solid above-average hitter to out of the league in just a few seasons. Given the youth and productivity in NPB, Murakami will most likely seek a longer-term contract, which may also be harder for the Jays to swallow in terms of risk mitigation. ZIPS projects Murakami to have a 126 wRC+ with a 3.4 fWAR, but the range of outcomes is going to be super-high, depending on whether he can adjust to velocity and if his strikeout rate can be managed. With the poor defensive fit, however, the Jays may look to other free-agent options to fill a defensive need. Still, they also have the defensive flexibility to hide Murakami’s shortcomings. 

The Blue Jays would love an injection of power, and the potential for Murakami's massive power is intriguing; however, the concerns may outweigh the benefits for the Jays' front office. The Jays prioritize defensive flexibility and strong bat-to-ball skills, which Murakami cannot fit into, but which may, in turn, allow them to handle Murakami’s shortcomings. The ultimate question is whether Murakami’s youth and potential will spark a bidding war or whether the Jays can get him on a reasonable contract if they choose to pursue him, thereby mitigating the risk. 

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