Seirogan | Famous medicine for diarrhea in Japan, with black spherical shape, Guided by Japanese webmaster !

Quotation Sauce:Seitogan webpage
This page is about

  • What is ‘Seirogan’ in Japan
  • History of ‘Seirogan’ in Japan
  • Effects of ‘Seirogan’ in Japan
  • Brief comments by webmaster
This page is to help the people :

  • Who like Japan !
  • Who are interested in Japanese culture
  • Who want to improve physical condition

SHINTA+ / Japanese blog writer, born and raised in Japan, visited more than 20 countries, introducing Japanese culture to the world, with both domestic & international experiences.

In this page, I would like to introduce ‘Seirogan’ as very popular long seller product in Japan.

You may get knowledge of ‘Seirogan’, as well as Japanese have, after reading of this article. Have fun ! 

What is ‘Seirogan’ in Japan

quotation source :

‘Seirogan’ is one of very famous medicine in Japan, which is mainly for diarrhea. ‘Seirogan’ is over the counter medicine. We can get it without prescription. ‘Seirogan’ contains wood-tar creosote. The color is black with spherical shape. The trumpet mark on orange package is the trademark of most famous ‘Seirogan’.

Basic knowledge of ‘Seirogan’

  • Famous medicine in Japan
  • Mainly for diarrhea
  • The color is black and package is orange
  • Trumpet on package is the trademark of Seirogan

‘Seirogan’ is popular medicine in Japan !

History of ‘Seirogan’ in Japan

quotation source :正露丸

The refined wood creosote was imported in 1839 from Netherlands. In 1880, creosote was was approved as medicine for military. And in 1902, initial ‘Seirogan’ was released to the market. As in Russia-Japan war in 1904, Seirogan was distributed to soldiers, ‘Seirogan’ was getting popular in Japan.

History of ‘Seirogan’

  • Wood creosote was imported in 1839
  • It’s used for medicine in military in 1880
  • 1902 Started sales as Seirogan to general consumers
  • 1904 Spread to all over Japan, through the soldiers in war

‘Seirogan’ has history more than 100 years in Japan !

Effects of ‘Seirogan’

quotation source :

Other than the diarrhea, ‘Seirogan’ has effects on various conditions, such as food poisoning, water poisoning, toothache from bad tooth, etc. As ‘Seirogan’ has own unique smell there’s a product with sugar coated. It’s not recommended to give ‘Seirogan’ to children less than 5 years old.

More information about ‘Seirogan’

  • Efficacy of ‘Seirogan’
    • Diarrhea
    • Poisoning of water, food
    • Toothache of bad tooth
  • Having unique smelling
  • To soften smell, there is sugar coated products
  • Not recommended to give Seirogan to children less than 5 years old

Please try to smell ‘Seirogan’, if you have an opportunity.


In the end, I would like to summarize the points of this article as follows

What is ‘Seirogan’ in Japan

  • Popular medicine in Japan, mainly for diarrhea
  • No need to have prescription in purchasing
  • Black, spherical shape, with unique smell
  • Started sales in 1902
  • Various efficacy, diarrhea, poisoning of water, food, toothache, etc


That’s all today.
How was the content today ?

Seirogan is one of famous medicine in Japan. Actually, I often have Seirogan, when I have diarrhea. And I usually have a stock of Seirogan in my first aid kit (medicine box), as essential item in my life.


Thank you very much for your reading today and see you again !


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