Faelco on 27 September 2016
Because the fiscal year in Japan ends in March, and they need to sell something this year to have at least something in their annual report.
But I agree that a console launch in March would be weird and could be ineffective, it's a rather calm period and can be dead compared to the end of the year. And an underwhelming launch could be pretty bad for the rest of the console's life (example: Xbox One...).
