Grand Slam Anime Details and Episodes Sekai Isshin was trained in Kenpo by his grandfather for 10 years but has never won a single match. When he entered high school, he thought he finally… Series info Watch free DetailsFormatMangaStatusFinishedSourceOriginalCountryJapan GenresSlice of LifeSports TagsBaseballSchoolSeinen RecommendationsOokiku FurikabutteMajor 2ndDiamond no AceBatteryOblivion BatteryMIXBUNGO