UPSIDER Signs Official Sponsor Deal with Sendai 89ERS for 2026-27 Season

株式会社UPSIDER and the Sendai 89ERS finalized an official club sponsorship for the upcoming 2026-27 season, tying a major corporate financial platform to a professional basketball team preparing for a historic league transition, according to reports from prtimes.jp.

Sendai 89ERS Enter B.League Premier After Corporate Support Deal

The Sendai 89ERS operate as a professional basketball club based in Miyagi Prefecture, anchoring their identity in local history. The team name draws from two significant local milestones: the municipal incorporation of Sendai in 1889 and its designation as a designated city in 1989. Operating under the corporate philosophy of contributing to a prosperous society and vibrant urban community through basketball, the club built its reputation on grassroots connection. The franchise retains a resilient history, having fought its way back to stability with the direct backing of its fan base following the devastation of the Great East Japan Earthquake. As the team prepares to step into the inaugural season of the B.League Premier for 2026-27, management secured backing from a Tokyo-based financial infrastructure provider to shore up resources for the ambitious campaign.

UPSIDER Expansion Targets Regional Sport Economies Through Financial Infrastructure

Tokyo-headquartered corporate finance firm 株式会社UPSIDER operates under the corporate mission of building a global financial platform to support challengers, delivering specialized financial technology and management infrastructure to growth companies across Japan. Led by Representative Director Toru Miyagi, the company maintains its main office in Roppongi, Minato-ku, Tokyo, with a capitalization of 100百万円 since its establishment in May 2018. The corporate group provides a broad spectrum of services designed to eliminate administrative and cash-flow bottlenecks for mid-sized firms and startups. Offerings include the AI-driven corporate card product UPSIDER, the invoice card payment service 支払い.com, the executive card PRESIDENT CARD, and the startup-focused growth debt fund UPSIDER BLUE DREAM Fund, which surpassed 170億円超 in cumulative lending by September 2026. Across all group services, total active user companies exceeded 120,000 by September 2026, while cumulative credit limits issued via the core corporate card platform topped 5兆円以上 by November 2025.

UPSIDER Sponsors Sendai 89ERS to Stimulate Regional Growth

Under the terms of the newly minted agreement finalized for the 2026-27 campaign, 株式会社UPSIDER will serve as an official sponsor of the Sendai 89ERS, backing the club as it crosses into the B.League Premier. Company executives noted that the decision to sponsor the franchise stems from a shared philosophy of resilience and ambition. While many regional sports partnerships focus purely on brand visibility, the corporate backer emphasized that the alliance is designed to use the convening power of sport to stimulate economic growth and community vitality throughout Sendai and the broader Tohoku region. The partnership arrives as the basketball club transitions into the B.League Premier, setting up a synchronized push for regional development between a high-growth financial technology firm and a sports institution.

Unresolved Questions Surrounding Partnership Activations

Neither 株式会社UPSIDER nor the Sendai 89ERS administration disclosed the financial terms or the precise commercial valuation of the 2026-27 sponsorship contract in their initial announcements. Specific marketing activations, fan engagement events tied to the corporate card platform, and branding placement locations inside the team’s arena remain unconfirmed as club officials finalize preparations for the upcoming competitive calendar.