On November 16, 2025, the Japanese D1 GRAND PRIX (D1GP) held its final showdown of the year. RYDANZ SHIBATA Racing Team’s star driver, Koudai Sobagiri, showcased exceptional skill and consistent performance to claim the prestigious annual Solo Run Championship, while also securing the runner-up position in the Tandem Battle, bringing the 2025 season to a triumphant close.

　　Well-Deserved Annual Solo Run Champion

　　In this highly competitive final round, Sobagiri demonstrated precise control and leveraged the outstanding performance of RYDANZ’s R-Series racing tyres — the R23 and R31 — to deliver top-tier driving. His aggressive yet composed style earned high praise from judges and fans alike, ultimately earning him the coveted annual Solo Run Champion title.

　　Strong Showing as Tandem Battle Runner-up

　　In the Tandem Battle, Sobagiri continued to display formidable competitiveness. Thanks to excellent tyre grip and sharp track awareness, he secured the runner-up position, underscoring his comprehensive drifting skills and dominance on the circuit.

　　RYDANZ R23 and R31 — The Winning Edge Behind the Champion

　　Throughout the season, the RYDANZ SHIBATA Racing Team relied on their self-developed high-performance racing tyres, the R23 and R31 series, empowering their drivers to maintain outstanding performance across diverse track conditions.

　　R23: Features precise water drainage and a wear-resistant compound, balancing wet grip and long-lasting durability.

　　R31: Equipped with large, high-rigidity tread blocks and jagged edges, ensuring cornering stability and exceptional handling at high speeds.

　　These high-performance tyres proved indispensable tools for Sobagiri’s pursuit of the championship.

　　With the 2025 season concluded on a high note, RYDANZ remains committed to innovation and the spirit of motorsport, supporting drivers in pushing limits and conquering tracks. We eagerly anticipate new achievements from Koudai Sobagiri and the SHIBATA Racing Team in upcoming seasons.

　　RYDANZ TYRE——EVERY MILE, EVERY METER