Japan organised the world's first Otaku Expo from 28 March 2015 to 29 March 2015 at Makuhari Messe Convention Center in Chiba Prefecture.
The Expo was organized as a part of a special comic book fair held every five years, which attracts about half a million visitors.
For the first time groups from outside Japan were invited to mark the event. About four dozen overseas Otaku groups attended the Expo.
The visitors so-called Otaku, usually translated as geeks, from at least 18 countries and territories, many dressed as their favourite anime characters.
The culture of Otaku has grown into a major industry in Japan.
The term is commonly used in the country to refer to people obsessed with Japan's unique take on comics and animation.
While it once carried a negative connotation, many Otaku are now proudly displaying their love for two-dimensional heroes while the number of foreign fans is also soaring.
What: Japan organised