In 2009, Belgian photographer Anton Kusters went to Japan and gained the trust of high-ranking members Japan’s organized crime families, known as the yakuza. He was allowed to photograph them for two years, giving Westerners a revealing glimpse into the secretive underworld syndicate. He published a book in 2011, called Odo Yakuza Tokyo. Earlier this month The Economist produced a short film about Kusters’ project, called Japan’s Yakuza: Inside the syndicate.