I'm sure Fuji TV would've received some kind of payment from Channel Nine for taking their idea (lest they'd be sued by Fuji TV). But I'm sure that Channel Nine is all too experienced in adapting shows from other countries for Australian TV - remember that their own boss Eddie McGuire once hosted the Australian version of Who Wants To Be A Millionaire (originally from the UK) and 1 vs 100 (originally from the Netherlands).