The Nomura Research Institute (NRI) has made two major studies into , the first in 2004 and a revised study with a more specific definition in 2005. The 2005 study defines twelve major fields of interests. Of these groups, manga (Japanese comics) was the largest, with 350,000 individuals and ¥83 billion market scale. Idol were the next largest group, with 280,000 individuals and ¥61 billion. Travel with 250,000 individuals and ¥81 billion. PC with 190,000 individuals and ¥36 billion. Video game with 160,000 individuals and ¥21 billion. Automobile with 140,000 individuals and ¥54 billion. Animation (anime) with 110,000 individuals and ¥20 billion. The remaining five categories include Mobile IT equipment , with 70,000 individuals and ¥8 billion; Audio-visual equipment , with 60,000 individuals and ¥12 billion; camera , with 50,000 individuals and ¥18 billion; fashion , with 40,000 individuals and ¥13 billion; and railway , with 20,000 individuals and ¥4 billion. These values were partially released with a much higher estimation in 2004, but this definition focused on the consumerism and not the "unique psychological characteristics" of used in the 2005 study.