Sign in

Private company

Yokoyama Seiyaku

Yokoyama Seiyaku is a Japanese company based in Hyōgo Prefecture, founded in 1947.1

横山製薬株式会社（よこやませいやく）は、兵庫県明石市相生町に本社を置く日本の製薬会社である。1900年（明治33年）創業。コーポレートスローガンは「あなたの悩みイチコロリ」。2 From the Japanese Wikipedia, CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

Feb 1, 1947Founded1

See how the biggest companies compare on our leaderboards

Timeline

  1. Feb 1, 1947Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2