Gen Hiraiwa proves his value for Alvark Tokyo under B.League rule

Under the previous “on-the-court two” regulations, substitutions involving non-domestic players typically followed rigid structural paths. The new system removes those strict numerical constraints, allowing teams to deploy multiple naturalized and foreign talents simultaneously. Alvark Tokyo leaned heavily into this shift during the opening series, deploying a massive lineup featuring naturalized player Ryan Rossiter alongside DJ Hogg, Keyonte Johnson, Lachlan Olbrich, and standout Japanese wing Taiki Osakabe in key stretches.

Yet Hiraiwa, a homegrown big man who has remained with Alvark Tokyo since his special designation during the 2018-19 season, managed to buck that trend. In the opening victory, he logged six minutes and 46 seconds of floor time, serving as a disruptive anchor who forced Ryukyu center Jack Cooley into foul trouble. Although second-half deficits limited his minutes in the subsequent loss, Hiraiwa featured during the first half.

Hiraiwa acknowledged the tactical balancing act demanded by the new regulation. “We cannot summarize everything after just two games,” Hiraiwa said regarding the rule’s broader impact. “Even if the on-the-court free rule represents maximum firepower, there are times when we must not use this approach and instead need to save [foreign player] playing minutes. I realized how important it is to figure out how to improve the team during those specific stretches.”

Tactical shifts and positional pressures

The structural transformation goes beyond mere substitution patterns. Hiraiwa pointed out that the alteration fundamentally redefines how domestic players compete for minutes across the entire floor.

“You could also view it as domestic players becoming equal regardless of position,” Hiraiwa explained. “Until now, foreign and naturalized players were concentrated heavily among big men, and teams rotated primarily through them. With the restrictions lifted, we are seeing more foreign players deployed at non-big positions. For Japanese players, it has become difficult to secure court time not just at the big man spot, but across every position.”

Despite that heightened competition, Hiraiwa is steadily expanding his footprint within head coach Ryan Richman’s system. Richman has praised the forward’s capacity to elevate teammates through clever tactical coordination. Hiraiwa highlighted his chemistry with the roster, noting that executing screen-and-roll actions with Osakabe to clear driving lanes or combining with Johnson forms the core of his offensive utility.

Schedule considerations and future outlook

External tournament constraints provide an additional layer of tactical complexity for Alvark Tokyo. Because competitions such as the Emperor’s Cup and the East Asia Super League maintain separate foreign player regulations, the value of reliable domestic frontcourt options remains high for clubs juggling domestic league play with regional commitments.

Hiraiwa approaches the challenges and benefits of the new environment with pragmatic caution. “There are certainly benefits we receive from the rules changing, but at the same time, teams have the option to push forward with [all foreign and naturalized players on the floor],” Hiraiwa said. “I must not rest on my current status and instead work diligently every day so I can perform my job at a high level.”

Evaluating the long-term consequences of the on-the-court free rule remains premature after a single weekend. However, the early returns indicate that for disciplined domestic contributors willing to embrace their defensive assignments and tactical roles, the evolving B.League structure offers tangible avenues for professional growth.