The 2023 Fanatec Japan Cup Series is the second season of the Japan Cup Series, an auto racing series for grand tourer cars in Japan, co-promoted by the SRO Motorsports Group and Team Asia One GT Management. The races are contested with GT3-spec and GT4-spec cars. The season began on 17 June at the Fuji Speedway in Shizuoka and is scheduled to end on 20 August at Okayama International Circuit in Okayama.[1]