Honda and Fujishima (Nature,1972) →#Papers (a-er ‘75) →#Patents (a-er ‘95) →Market (a-er ‘03) (Industrial Association of Photocatalysis) # patents (JPO) Photocatalysis (光触媒) 榊原・辻本・松本(2011) Technology Market 0 100 200 300 400 500 600 1970 1975 1980 1985 1990 1995 2000 論文数 出版年 その他 米国 中国 日本 # Papers Science Year # papers Others US CHN JPN Talent, Organization, Institution