Queens and princesses donned their finest tiaras as they stepped out for a banquet honouring Japan's new Emperor last night.
Royals from Spain, Belgium and the Netherlands rubbed shoulders with guests from 180 different countries as dignitaries gathered in Tokyo to celebrate Emperor Naruhito's formal ascension to the throne.
The visiting royals ensured they were dressed to the nines for the high-profile occasion, with each finishing their dramatic ensembles with a showstopping tiara from their personal collections.
From Queen Maxima of the Netherlands' stunning ruby-encrusted sparkler to Sweden's Crown Princess Victoria's treasured family heirloom, Femail takes a closer looks at the glittering creations on show.
QUEEN LETIZIA OF SPAIN: FLEUR DE LYS TIARA
The Fleur de Lys tiara worn by Queen Letizia last night is considered to be the finest of the Spanish royal jewels, earning it the nickname 'La Buena', or 'the good one'.
The tiara was crafted in 1906 as a wedding present from King Alfonso XIII to his bride, Princess Victoria Eugenie of Battenberg, who was a granddaughter of Queen Victoria.
The impressive diadem is made from platinum set with more than 500 individual diamond. It features the Fleur de Lys, the emblem of King Alfonso's family.
It has only been worn by the reigning Queen of Spain and has been seen on Queen Letizia on a number of high profile occasions.
QUEEN MAXIMA OF THE NETHERLANDS: MELLERIO RUBY TIARA
The stunning Mellerio Ruby Parure Tiara worn by Queen Maxima last night is the larger of two ruby encrusted tiaras in the Dutch collection.
The Dutch ruby tiara was crafted by celebrated French jewellery firm Mellerio dits Meller for Queen Emma of the Netherlands in 1889 as part of a larger collection gifted by her husband, King Willem III.
The piece has a very classic tiara shape, with rows of diamonds suspended between the larger elements that sits well on a variety of hairstyles.
All four of the Dutch queens since Emma have worn the tiara, with Maxima choosing it for her first official portrait as Queen.
Last night the radiant Dutch royal wore the tiara with a number of other pieces from the ruby collection.
CROWN PRINCESS MARY OF DENMARK: THE EDWARDIAN TIARA
Elegant in a mauve evening gown with a flattering cape, Crown Princess Mary of Denmark finished her look with the twinkling Edwardian tiara.
The piece features diamonds, rubies and spinels set in silver and gold. It is a so-called 'convertible' tiara, meaning it can be taken off its frame and worn as a necklace.
Unlike other royal jewels in her collection that were gifted to her by her husband and in-laws, Mary reportedly purchased the tiara and a pair of matching earrings for herself.
Both the tiara and earrings were sold by Bruun Rasmussen in Copenhagen in May 2012.
CROWN PRINCESS VICTORIA OF SWEDEN: THE BOUCHERON LAUREL WREATH TIARA
Princess Victoria's Boucheron Laurel Wreath Tiara is distinguished from many other royal jewels thanks to its unusual shape.
The piece is made up of two bands of diamond encrusted leaves. The first band sits flat to the head while the second stretches above in an arch. A single impressive drop diamond hangs from the top band.
The tiara has a long and complicated history, which has been documented in detail by royal blog The Court Jeweller.
Princess Victoria inherited the diadem from her great-aunt, Princess Lillian of Sweden, on her death in March 2013.
The heir to the throne first wore the tiara at the wedding of her sister Princess Madeleine in June 2013.
QUEEN MATHILDE OF BELGIUM: THE NINE PROVINCES TIARA
One of the surprisingly few crowns in the Belgian royal family's collection, the Nine Provinces Tiara never fails to catch the eye when it is worn to formal occasions.
The tiara was gifted to Princess Astrid of Sweden on her wedding to the future King Leopold of Belgium in 1926.
The piece is made up of a number of different components that can be combined to create a number of different looks.
Last night, Mathilde wore only the diamond-encrusted bandeau, rather than the full tiara.
EMPRESS MASAKO OF JAPAN: THE MEIJI TIARA
The elegant Meiji Tiara of Japan's royal collection was first worn by Empress Haruko in the 1880s.
The Empress is thought to have acquired the diamond scroll tiara from a European designer, possibly luxury French jeweller Chaumet, according to The Court Jeweller.
The name 'Meiji' references the name given to her husband, Emperor Mutsuhito, following his death in 1912 and refers to the period of great change that the country witnessed under his rule.
The diamond tiara originally featured large diamond stars styled in spikes above the main band but is now worn without, as seen on the Empress last night.