Tosoh CEOs: 10 Presidents Since 1948

Revenue and CEOs10 CEOs
Tosoh
CEOs and long-term results
FY2026
Consolidated
Revenue
¥1.0 trillion
Net margin
4.1%
SadanagaNinomiyaAokiMorishimaYamaguchiTashiroTsuchiyaUdagawaYamamotoKuwada
Revenue¥6.6 billionRevenue¥15.3 billionRevenue¥127.8 billionRevenue¥218.2 billionRevenue¥349.3 billionRevenue¥648.8 billionRevenue¥753.7 billionRevenue¥1.0 trillionNet margin3.9%Net margin1.4%Net margin1.5%Net margin3%Net margin4.2%Net margin5.3%Net margin4.1%1951/31956/31961/31966/31971/31976/31981/31986/31991/31996/32001/32006/32011/32016/32021/32026/3
Revenue¥15.3 billionRevenue¥218.2 billionRevenue¥648.8 billionRevenue¥1.0 trillionNet margin3.9%Net margin1.5%Net margin4.2%Net margin4.1%1951/31956/31966/31976/31986/31996/32006/32016/32026/3
API: /api/4042/financials_history.csv · /api/4042/financials/pl.json
Tenure timeline
1940195019601970198019902000201020202030
Keiho SadanagaYoshimoto NinomiyaShukichi AokiTozo MorishimaToshiaki YamaguchiMadoka TashiroTakashi TsuchiyaKenichi UdagawaToshinori YamamotoMamoru Kuwada
Presidents10

Presidents

NameFromToYearsBackgroundEducation
Keiho SadanagaMay 1948Nov 19535.5Outsider
Yoshimoto NinomiyaMar 1954OutsiderTokyo Imperial University, Faculty of Economics (1927)
Shukichi Aoki1968OutsiderTokyo Imperial University, Faculty of Economics, Economics (1934)
Tozo MorishimaJun 197919844.6OutsiderTokyo Imperial University, Faculty of Law, Political Science (1941)
Toshiaki Yamaguchi1984Company veteranTokyo University of Commerce (now Hitotsubashi University) (1951)
Madoka TashiroJun 1992Company veteranUniversity of Tokyo, College of Liberal Arts (1956)
Takashi TsuchiyaJun 2001Company veteranTokyo Institute of Technology, School of Science and Engineering (1965)
Kenichi UdagawaJun 2009Mar 20166.8Company veteranTokyo Institute of Technology (1972)
Toshinori YamamotoMar 2016Mar 20226.0Company veteranKobe University, Faculty of Economics (1979)
Mamoru KuwadaMar 2022Present4.7Company veteranOsaka University, Faculty of Science, Polymer Science (1984)