Oshi Tabi【JR East Official】on X: "／ 📢Don't miss it DO DANCE!! ＼ The "Sai KOO DE TRIP Campaign" will end on 2/1! The advertisement at Tokyo Station Nihombashi Guchi ticket gate will also be until 2/1, so make sure to check both✅ #SaiKOODEDANCE #DJKOO #BEYOOOOONDS #OshiTabi" / X