A downloadable Sci-Fi Supplement

Buy Now$5.00 USD or more

In this system-agnostic Sci-Fi supplement and love-letter to Mushishi by Yuki Urushibara, your characters play as frontier doctors called Kaichū-Shi or Parasite Masters. 

They'll explore dark forests and research parasitic organisms, known as Kaichū,  that exist in a classification somewhere between plants and insects. Heal colonists and blue collar workers who fall sick with mysterious ailments, exhibiting symptoms that vary from minor to life-threatening.

Many of the organisms are only visible when viewed through specific spectrums of light. Some only partially exist in this universe. When viewed, they are often semi-corporeal, ethereal creatures that bend light around them as they float and crawl around.

To play you'll need: 

  • This Pamphlet
  • A set of polyhedral dice (specifically d10's)
  •  The TTRPG of your choice

The digital download includes:

  • A Letter-sized Pamphlet PDF and PNG
  • Printer-friendly version
  • Creature and Scenario Generation
  • Short Settlement description and topological map

CW: This module contains elements relating to sicknesses and treatments and may not be suitable for all audiences

Japanese Language Consultation - Yurie Murayama

Fancy some Kaichū-Shi merch? Get it here.

Kaichu-Shi, a Stone Grey Premium Unisex Tee

CategoryPhysical game
Rated 5.0 out of 5 stars
(14 total ratings)
AuthorLone Archivist
TagsAliens, Dark, doctor, healer, mushishi, parasite, physician, Sci-fi, scifi


Buy Now$5.00 USD or more

In order to download this Sci-Fi Supplement you must purchase it at or above the minimum price of $5 USD. You will get access to the following files:

Kaichu-shi v1.0.zip 55 MB

Community Copy

Support this Sci-Fi Supplement at or above a special price point to receive something exclusive.

Community Copy

If you're interested in this game but can't quite afford it or are struggling to make ends meet, please feel free to grab a Community Copy.

This includes the digital version of the Kaichū-Shi.

Development log

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