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4527 on Tokyo Stock Exchange

Rohto Pharmaceutical Co., Ltd.

Logo: Rohto Pharmaceutical, Public domain, via Wikimedia Commons3

Japanese consumer goods company

Rohto Pharmaceutical Co., Ltd. (ロート製薬株式会社, Rōto Seiyaku Kabushiki-gaisha) is a Japanese multinational corporation specializing in fast-moving consumer goods and pharmaceuticals, headquartered in Ikuno-ku, Osaka, Japan. The company primary focuses on skin and eye care products. They also produce cosmetics, supplements, and over-the-counter medications.2 Its shares trade on Tokyo Stock Exchange under the symbol 4527.1 Wikipedia text CC BY-SA 4.0

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Last updated Oct 21, 2026.

Overview

1899Founded1

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  • Ticker4527 on Tokyo Stock Exchange1
  • Industrypharmaceutical industry1
  • HeadquartersOsaka Prefecture1
  • Websitewww.rohto.co.jp
  • Legal formkabushiki gaisha1

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Rhoto Pharmaceuticals HQ
Photo: CC BY 3.0, via Wikimedia Commons5

Rohto Pharmaceutical Co., Ltd. (ロート製薬株式会社, Rōto Seiyaku Kabushiki-gaisha) is a Japanese multinational corporation specializing in fast-moving consumer goods and pharmaceuticals, headquartered in Ikuno-ku, Osaka, Japan. The company primary focuses on skin and eye care products. They also produce cosmetics, supplements, and over-the-counter medications.2

Corporate structure

Rohto Pharmaceutical Co., Ltd. sits at the top of its group. 3 entities, 3 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Built from subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

What it owns

What Rohto Pharmaceutical Co., Ltd. reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Stakes and holdings (Wikidata)

Things Wikidata records the company as owning, with the share when stated.1

The story

Yasutami Yamada (山田 安民) founded "Japanese: 信天堂山田安民薬房, lit. 'Shintendo Yamada Yasutami Pharmacy'" in Osaka, on February 22, 1899. ROHTO Pharmaceutical Co. is the largest company in Japan's OTC drugs market, commanding a 40% share in the eye-drop sector. The name "Rohto" was inspired by August von Rothmund, a German ophthalmologist who was a professor for Toyotaro Inoue (井上 豊太郎, Inoue Toyotarō), a Japanese ophthalmologist.

From Wikipedia’s article on Rohto Pharmaceutical, shared under CC BY-SA 4.0.4

Subsidiaries and ownership

Subsidiaries

From Wikidata.1

Timeline

  1. 1899Founded Founded1

Sources

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

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