Fri Jan 23 - Thu Jan 29, 2015 Sunshine 60 Building Observatory
The phenomenon known as 'Diamond Fuji' occurs when sunset and sunrise align perfectly with the peak of Japan's highest mountain, creating a mysterious, jewel-like image.
This twice-a-year occurrence is best viewed from Sunshine City's 60th-floor observatory, with its 360-degree views of Tokyo and surroundings.
The exact date for the first 'diamond' is January 26, but the effect can be seen a few days before and after that as well.
Don't miss the opportunity completely though – you'll have to wait until the middle of November for the next alignment.