Some years ago we had a Japanese film crew coming to our base for some tourist video production. They needed aerial shots of a town nearby. No offshore/night/hazardous areas or whatsoever. Just nice weather flying over open fields in the summer.
Still, the company pulled back in the last moment, when they found out we were only operating singles.
This year I flew a Japanese camera team in Spain and they didnt care at all that we were flying along coast lines and mountains in a single.
Maybe its company specific there or has to do with lots of flying over open water and densely populated areas in Japan.