New Balance Japan becomes Samurai Japan's official kit supplier across all nine squad tiers
New Balance Japan has signed on as a Diamond Partner official supplier to Samurai Japan, putting its uniforms on every one of the national baseball programme's nine squad tiers and a from-scratch new kit on sale at its own Japan stores from October 20 — a sponsorship with a dated retail product launch attached, not a logo deal.
New Balance Japan has signed an official supplier agreement with Samurai Japan, Japan's national baseball programme, as a Diamond Partner, the company and NPB Enterprise Co., Ltd., which runs the programme, said on October 7. The deal puts New Balance uniforms on every one of Samurai Japan's nine squad tiers: the top team, the corporate-league side, the university, U-23, U-18, U-15 and U-12 squads, the women's team and the Baseball5 squad.
Beyond match uniforms, New Balance will supply practice wear, training apparel, footwear and baseball equipment across the programme, and the partnership extends to baseball-promotion and grassroots activities rather than team kit alone, the companies said.
The two sides developed a new uniform from scratch, unveiled alongside the top team's latest roster announcement. The home kit uses a deep indigo-brown base the release calls kachi-iro with a red suō centre stripe, a design New Balance says evokes a "road" running through Japanese baseball's history; the away kit is a grey nezumi-iro drawing on wabi-sabi and sui aesthetics that the company notes also doubles as a nod to its own brand colour. Both carry a new two-letter "SJ" monogram, also used on a redesigned cap. The uniform's on-field debut is set for the Asia Pro Baseball Championship 2026, which starts November 12.
Retail comes first: the uniforms and caps go on sale through New Balance's official online store and select directly run stores from October 20, more than three weeks before players wear them in competition. The release did not disclose pricing.
Putting replica kit on sale weeks ahead of its on-field debut is a retail calendar decision as much as a sponsorship one — fan demand gets captured before the uniform has even been seen in a match, the same logic apparel makers use around a new national football kit launch. Holding every age tier at once, from a 12-year-old's youth-squad shirt to the senior team's game jersey, also gives New Balance one retail story to tell across its stores for years rather than a single tournament's cycle.
What to watch is whether the kit holds up as a retail item once the Asia Pro Championship ends, rather than fading as a tournament-only novelty, and whether New Balance extends the same single-supplier model elsewhere in Japanese sport.