Koshigaya Alphas made the long trip north and left with a statement, defeating the Iwate Big Bulls 90-77 at Iwate Prefectural Gymnasium in B2 League action on Saturday afternoon. A dominant third quarter and a balanced scoring attack allowed the visitors to pull clear after a competitive first half, handing the Big Bulls a home defeat in front of their own supporters.

The result continues a strong run of road form for Koshigaya, who have quietly built a reputation as one of the more disciplined defensive teams in Japan's second division. For Iwate, it was a frustrating afternoon defined by cold shooting stretches and too many turnovers at the wrong moments.

Match Overview

• Final score: Iwate Big Bulls 77 - 90 Koshigaya Alphas
• League: B2 League
• Date: 10 October 2026
• Venue: Iwate Prefectural Gymnasium, Morioka
• Quarter scores: 18-24, 21-20, 17-25, 21-21

Koshigaya led from the opening minutes and never surrendered the advantage, but the game remained within reach for Iwate until midway through the third period. That was when the Alphas produced the decisive run of the contest, stretching a five-point cushion into a margin the home side could not recover from.

First Half: Alphas Set the Tone Early

The Alphas came out with clear intent, pushing the tempo off made baskets and attacking the rim before Iwate's half-court defense could set. A 24-point opening quarter gave them an early cushion, and while the Big Bulls responded with a better second period, they never managed to fully close the gap before the break.

Iwate's offense leaned heavily on perimeter shooting in the first half, and when those looks stopped falling, the offense stalled. The Big Bulls managed just 18 points in the first quarter and were forced to play catch-up basketball for the rest of the afternoon, which played directly into Koshigaya's hands.

Key Moments

The turning point arrived early in the third quarter. With Iwate within striking distance, Koshigaya rattled off a series of transition baskets and second-chance points to break the game open. The Alphas outscored the hosts 25-17 in that period, the only quarter in which either team truly separated.

Another critical stretch came late in the third, when back-to-back three-pointers pushed the lead past 15. Iwate's bench called timeout, but the momentum had already shifted. From that point, the Big Bulls were chasing rather than dictating.

Tactical Story

Koshigaya's game plan was built on defensive pressure and quick ball movement. The Alphas switched aggressively on screens, forced Iwate's guards into contested mid-range attempts, and then ran the floor after defensive rebounds. That combination produced a steady stream of efficient looks.

Iwate, by contrast, struggled to generate clean interior touches. Their half-court sets became predictable, with too much isolation and not enough off-ball movement. When the Big Bulls did find open shooters, the conversion rate simply wasn't high enough to keep pace with a Koshigaya side scoring 90 points on the road.

The free-throw line told a similar story. Koshigaya consistently drew contact on drives and converted their opportunities, while Iwate settled for jumpers and finished with fewer trips to the stripe.

Standout Performers

The Alphas' backcourt controlled the tempo throughout, with their lead guard repeatedly breaking down the defense off the dribble and finding open teammates on the perimeter. A versatile forward contributed on both ends, cleaning up the glass and running the floor in transition.

For Iwate, the bright spots came from their frontcourt, which battled hard on the boards and produced the majority of the team's second-half points. The Big Bulls' shooting guard also showed flashes of shot-making ability, but the supporting cast could not sustain enough offense to make it a genuine contest down the stretch.

What It Means in the B2 League Table

Road wins of this quality matter in the B2 League, where playoff seeding is often decided by a handful of games. Koshigaya's ability to win comfortably away from home strengthens their position in the upper half of the standings and reinforces their credentials as a promotion contender.

For Iwate, the loss is a setback in what has been an inconsistent campaign. The Big Bulls remain a tough team to beat at home, but consistency on the offensive end continues to be the difference between winning and losing tight games in a competitive division.

Up Next

Iwate will look to regroup quickly, with the schedule offering little time for reflection in the B2 calendar. Their focus will be on ball security and creating better shot quality early in posses