Although this figure is is regularly sited in the context of Ghosn's decision to flee the country this statistic is misleading since in Japan this figure counts cases where the defendant pleads guilty. So this 99% figure applies to all prosecuted cases not just contested cases. If the US were to use the same calculation the conviction rate would be about the same. I believe it was Ghosn's team who first referenced this statistic in the wake of his escape and it was something of a stroke of PR genius as it seems to find its way into nearly all coverage of Ghosn's escape. And these references are seemingly always without a comparative context. The following is a good read on this statistic:
https://thediplomat.com/2020/03/carlos-ghosn-and-japans-99-c...