A reliable new player with a wealth of experience and the ability to win on the big stage
The Saitama Seibu Lions have made aggressive signings this offseason. In particular, we want to focus on Masayuki Kuwahara, who joined the team after exercising his free agency rights.
With his extensive experience playing in 1,239 games over 14 years of active service, and his strength on the big stage, as evidenced by his MVP award in the 2024 Japan Series, Kuwahara's presence in a new team with many young players is considered to be of great importance.
This article will introduce Kuwahara's characteristics and strengths, referencing the various statistics and metrics he has recorded. We will look back on the achievements of this renowned player who has displayed high-level play in hitting, fielding, and running, and also consider the positive impact that Kuwahara's addition will have on the team.
He has been a key player for Yokohama DeNA, combining productivity as hitter with excellent defense ability.
The various indicators that Kuwabara has recorded so far by year are as follows.
In 2021, he played in 135 games and had a .310 batting average, and in 2025, his most recent year, he reached the batting order and had a .284 batting average. In addition to his good hitting, he also has the punch to achieve double-digit Home Run seasons three times, and will be a valuable asset to Saitama Seibu Lions, which has been plagued by a lack of scoring.
hitter He has a .722 OPS for his career, which is above a certain level. He has posted an OPS of .740 or higher for three consecutive years since 2016, just after becoming a regular, and an excellent .843 OPS in 2021. He is impressing.
In addition to his hitting accomplishments, another major strength is his reputation for outfield defense winning the Mitsui Golden Glove Award in 2017 and 2023. The addition of Kuwabara, who is highly capable offensively and defensively, is likely to bring significant positives in a variety of aspects in his new position.
Further improvement is needed in batting and stolen base bases
Regarding his "struck out rate," calculated by dividing the number of struck out by the number of plate appearances, his career total is a respectable .158. Furthermore, he has achieved excellent results with struck out rate of .130 or lower in four of the last five seasons, demonstrating that struck out infrequently and possesses strong contact skills.
On the other hand, his career Walk rate, calculated by dividing the number of Walk by the number of plate appearances, is a mere .069, which is not particularly high. Furthermore, his IsoD (Identification of Discipline), an indicator of plate discipline that shows the difference between on-base percentage and batting average, is also below average at .062.
Kuwahara's tendency to have few struck out and Walk indicates that he possesses an aggressive batting style. As a result, his BB/K ratio, which is calculated by dividing struck out by Walk and is an indicator of plate discipline similar to IsoD, is .437 over his career, which is generally considered an average value.
Furthermore, it's interesting that he recorded a BB/K ratio above his career average four times in the five years since 2021, achieving a career-best .587 in 2021 and a second-best .508 in 2025. Looking at the trend in his BB/K ratio, which indicates an improvement in his ability to manage strike zone compared to his younger days, it could be argued that he has become more refined as hitter in recent years.
Kuwahara has recorded a total of 99 stolen base, using his speed as his main weapon, but his career average stolen base success rate is not particularly high at .664. However, he has made significant improvements in the last two years, with 8 stolen base stolen base in 2024 and 10 in 2025, without any failures. These numbers suggest that he has continued to evolve as a player now that he is approaching his 30s.
outfield has been a major change for Saitama Seibu Lions, a team that has had a long-standing problem.
Saitama Seibu Lions won two consecutive league championships starting in 2018 with a strong batting lineup as its biggest weapon, but Shogo Akiyama, the unshakable centerpiece of the team, left in the off-season of 2019. From the following year onward, the team was unable to fill the center fielder hole left by Akiyama, and for a long time the outfield lineup was the team's weak point.
However, in 2025, the Manaya Nishikawa player played 124 games with a batting average of .264, 10 Home Run and 25 stolen base as the top hitter, and also played well on the defense side on numerous occasions. In addition to the fact that Nishikawa is grabbing center fielder regular playing time, Seiya Watanabe and Shinya Hasegawa In addition, Nishikawa is getting a regular spot on the outfielder team, and both Nishikawa and Nishikawa have reached the regulation batting lineup, making this a season in which the rise of young players is more noticeable than in the previous year.
With the bright signs beginning to emerge, the addition of Kuwabara, who has a wealth of offensive and defensive experience, could be a significant factor in resolving longstanding issues. Seiya Watanabe Considering that Kuwabara played third base defense in fall practice, the addition of Kuwabara, who has a proven track record, to the outfield lineup is expected to increase flexibility in the use of players and intensify competition from next season onward.
Will he be the driving force that leads his new team to a higher ranking, just as he was during his time with The BayStars?
Before Kuwabara became a regular player in 2015, The BayStars were in the midst of a slump, finishing fifth or lower for eight consecutive years. However, since 2016, when Kuwabara became a key player for the Yokohama DeNA, they have grown into a powerhouse, making it into Class A seven times in ten years. This progression in the team's performance also shows the importance of Kuwabara to the team's rapid progress.
Will this speedy, hard-hitting outfielder, nicknamed "Gutsman" for his role as the team's driving force leader, bring positive energy to his new home and contribute to the team's rise to the top? We hope that Kuwabara's new challenge, in his 15th year as a professional, will bear fruit and produce positive results for both himself and the team.
Written by Ryota Mochizuki
