I have not stated anything that is specific to Spain in this thread? I do think there is something wrong with the safety culture in Spain, I mean obviously, there was an accident.
> but you can't say that it has ever happened in Japan.
That sounds very unlikely to me, and in fact Wikipedia indicates otherwise: https://en.wikipedia.org/wiki/Shigaraki_train_disaster
That is not a high-speed rail line... so, no?