Japanese star Tatsuya Imai is becoming the focus of MLB attention as early season struggles with the Houston Astros have raised questions about his decision to leave the NPB for American baseball — but according to several internal sources, the 27-year-old pitcher remains steadfast in his choice and committed to continuing his journey in Houston.

Amidst inconsistent performance and a challenging adaptation process, Imai’s story is no longer simply about an international rookie. It is becoming a symbol of the clash between expectations, reality, and the resilience of a star who once dominated Japanese baseball.

Tatsuya Imai entered the 2026 season with the reputation of being one of the NPB’s top pitchers. In his final season in Japan, he boasted an ERA of 1.92 and over 170 strikeouts, maintaining a dominant pitching record for many consecutive years, making him one of the most sought-after names on the international market.

The Houston Astros won the competition, signing Imai to a three-year contract worth approximately $54 million, with opt-out clauses after each season — a contract structure that allows both parties flexibility in the future.

Imai’s decision to join MLB was seen as a natural progression for an ace at the peak of his career. But the reality in the US proved far harsher than anticipated.

In his very first games, Imai quickly faced a major shock. Early season statistics showed he struggled with control:

ERA increased to over 7.00

Unusually high walk rate

Several games failed to exceed 3 innings

Significantly reduced strike zone

In a recent game, he was forced to leave the court early after scoring only one out, further increasing the pressure.

Beyond professional challenges, Imai also faced the stress of adapting to a new environment, from language and culture to a completely different pace of play compared to the NPB.

An internal source described it as:

“He’s not just learning to shoot in MLB — he’s learning to live in a whole new world.”

The situation became more complicated when Imai was placed on the injury list for arm fatigue, forcing the Astros to temporarily reduce his workload.

Although tests showed no serious injury, the team decided to return him to rehabilitation and begin rehab sessions in the minor league.

According to the plan, Imai is currently in the process of:

Adjusting his shooting technique

Reducing pitch count pressure

Rebuilding his pace of play

And regaining confidence on the mound

The Astros believe this is a necessary step to avoid long-term risks to a significant investment.

Amidst growing speculation about whether he regrets his decision to move to MLB, Imai indirectly responded through sources close to the team.

The message was clear: he has no intention of leaving Houston.

While acknowledging the adaptation process is “harder than imagined,” Imai is said to remain positive and focused on gradual improvement rather than looking too far ahead.

A source from the Astros stated:

“He knows he’s not at his best yet, but he’s not wavering on his choice. He wants to get through this phase in Houston.”

Despite a less-than-ideal start, the Houston Astros remain patient with Imai — partly because of his long-term potential, and partly because of what he showed in Japan.

The coaching staff believes the current issue is more about adjustment than ability. They are focusing on:

Optimizing the release point

Adjusting the pitching rhythm between fastball and breaking ball

Improving his ability to read MLB hitters

And supporting his psychological adaptation

The Astros understand that bringing an ace from NPB to MLB always involves a transition period, and Imai is just in the middle of that process.

Tatsuya Imai is not just an international trade. He is part of MLB’s strategy to expand its influence in Asia, where more and more stars from Japan are moving to the world’s top league.

But like many cases before, the difference in playing environment means that not everyone can adapt immediately.

Imai is standing right at that intersection: between global expectations and the harsh reality.

Despite a turbulent start, the message from Imai and the Houston Astros remains consistent: this is not a story of failure, but a transformation.

From an ace in Japan to a pitcher seeking a place in MLB, Tatsuya Imai is going through one of the most crucial phases of his career.

And if he overcomes this challenge, Houston could have not just an international pitcher…
But a true cornerstone of future rotations.