In its first B.League Division I campaign, Koshigaya is aiming to make a significant impact.
The Alphas are poised to sign Kai Sotto.
Basketnews first reported the development, which was confirmed to Tiebreaker Times by sources closely monitoring the situation.
Sotto, 22, is using the off-season to make another push towards his NBA dream.
The Alphas, for their part, are willing to wait for Sotto.
Koshigaya will be gaining a valuable asset in Sotto.
In 34 games with Yokohama, the 7-foot-3 big man averaged 12.76 points, 6.38 rebounds, and 1.09 blocks.
Sotto and the B-Corsairs mutually parted ways earlier this month after his loan from the Hiroshima Dragonflies expired.
Yokohama eventually acquired Kiefer Ravena through free agency.
Koshigaya and Shiga were promoted to B1 after reaching the B2 Finals.
The Lakes emerged as the champions.