The latest edition of Kojien, the most authoritative of Japanese dictionaries, hit the stores in January 2018. A team of 220 wordsmiths spent 5 years tracking words in the media and on the Internet before deciding on the 10,000 or so new entries that reflect Japan today, such as "jidori" (selfie) and "moe" (passion). Chief editor Yasunari Hiraki believes that words evolve with the times. We'll ask him about what goes into the making of a dictionary and what he feels is its role today.