Why did India’s run-out appeal against Japan go unreviewed?

India's run-out appeal against Japan went unreviewed because the historic one-off T20I in Sano had no third umpire or TV replay system. Ravi Bishnoi appealed after Shreyas Iyer's direct hit at bowler's end against Japan captain Kendel Kadowaki-Fleming, but on-field umpire ruled not out. There was no referral mechanism as venue lacked a full suite of broadcast and officiating technology.