Prince Charles was among the European royals which gathered in Tokyo today to attend a cocktail party and banquet hosted by the Japanese prime minister in honour of the newly enthroned Emperor Naruhito.
Today's festivities marked a second day of celebrations to hail his formal ascension to the throne, which took place on Tuesday in a centuries-old ceremony attended by dignitaries from more than 180 countries.
Around 2,000 guests from 180 different countries attended the occasion yesterday, before donning their finery for the evening's entertainment.
And tonight the formalities continued, as PM Shinzo Abe and his wife Akie laid on another extravagant drinks reception and banquet at a hotel in the Japanese capital.
Sweden's King Carl XVI Gustaf and his daughter Crown Princess Victoria were in attendance, with the mother-of-two donning an eye-catching nude gown with floral embroidery.
Princess Victoria swept her brunette locks back into a slick bun and opted for a smoky eye make-up look.
Crown Prince Frederik and Crown Princess Mary of Denmark also made an appearance, with the latter opting for a chic white dress with cap sleeves and gold embellishment which toned in nicely with her clutch bag and jewellery.
Queen Maxima of the Netherlands was also her usual stylish self, sporting a burgundy trouser suit with bejewelled detailing as she arrived on the arm of her husband King Willem-Alexander.
The beauty opted to keep her blonde hair down and sleek with a centre parting and accessorised with sparkling diamond flower drop earrings.
Czech Republic Prime Minister Andrej Babis and his wife Monika Babisova also attended the lavish event, with Monica looking simply stunning in a powder pink gown with cape sleeves and cut-out shoulders.
Also in attendance was King Jigme Khesar Namgyel Wangchuck and Queen Jetsun Pema of Bhutan, both of whom donned glamorous traditional dress for the occasion.
Naruhito became emperor and his wife Masako became empress on May 1 in a brief ceremony, but Tuesday's 'Sokui no Rei' was a more elaborate ritual at the royal palace in which he officially announced his change in status to the world.
Today's banquet featured a drinks reception before the feast, with performing artists providing entertainment for the invited guests.
The first Japanese emperor born after World War Two, Naruhito acceded to the throne when his father, Akihito, became the first Japanese monarch to abdicate in two centuries after worrying that advancing age might make it hard to perform official duties. He is 85.
The long-planned celebrations, for which Japan declared a national holiday, were tempered by Typhoon Hagibis, which killed at least 82 people when it tore through Japan 10 days ago, and pouring rain early on Tuesday.