The 'Right Place Right Time' singer smiled for fans at Narita International Airport on Thursday (31 October) following a long-haul flight from London.
Olly tweeted before taking off he was preparing for an "insane few days" with the 1D boys, filled with fab performances and plenty of catching up.
On landing he added: "Touched down in TOKYO! Woop woop! 1st time here, I'm full of beans! Can't wait to try proper Asian food!"
Olly will support One Direction on two sold-out dates in Tokyo – 2 November and 3 November – at the Makuhari Messe. He'll also perform a sold-out show at the Sound Museum Vision tomorrow night.
Then, he'll travel to New Zealand for a 7 November date in Auckland. Hope he got plenty of sleep on the plane!
Olly previously supported the 1D lads on tour in America, and was most recently a support act for Robbie Williams.
Ahead of jetting over to Japan, the former Xtra Factor co-host was spotted hanging out with Robbie and this year's X Factor groups, no doubt offering plenty of advice on how to achieve their dreams.
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Watch Olly's video for 'Right Place Right Time' below: