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Princess Tomohito of Mikasa, Opens the new Rose garden in Glasgow's Botanic Gardens. The Japanese princess, honourary president of her country's Rose Society, is leading a delegation to the 13th World Rose Convention in the city. (Photo by Maurice McDonald - PA Images/PA Images via Getty Images)

Princess Tomohito of Mikasa, Opens the new Rose garden in Glasgow's Botanic Gardens. The Japanese princess, honourary president of her country's Rose Society, is leading a delegation to the 13th World Rose Convention in the city.   (Photo by Maurice McDonald - PA Images/PA Images via Getty Images)

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Princess Tomohito of Mikasa, Opens the new Rose garden in Glasgow's Botanic Gardens. The Japanese princess, honourary president of her country's Rose Society, is leading a delegation to the 13th World Rose Convention in the city. (Photo by Maurice McDonald - PA Images/PA Images via Getty Images)

Princess Tomohito of Mikasa, Opens the new Rose garden in Glasgow's Botanic Gardens. The Japanese princess, honourary president of her country's Rose Society, is leading a delegation to the 13th World Rose Convention in the city.   (Photo by Maurice McDonald - PA Images/PA Images via Getty Images)

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Princess Tomohito of Mikasa, with Crurator Paul Mathew, opens the new Rose garden in Glasgow's Botanic Gardens. The Japanese princess, honourary president of her country's Rose Society, is leading a delegation to the 13th World Rose Convention in the city. (Photo by Maurice McDonald - PA Images/PA Images via Getty Images)

Princess Tomohito of Mikasa, with Crurator Paul Mathew, opens the new Rose garden in Glasgow's Botanic Gardens. The Japanese princess, honourary president of her country's Rose Society, is leading a delegation to the 13th World Rose Convention in the city.   (Photo by Maurice McDonald - PA Images/PA Images via Getty Images)