Twenty Years Later- Yutaka's Youkai Biology

The Biology of Sentient Humanoids: a comprehensive study


For as long as there have been sentient humanoids on this earth, cultures, be it human or youkai, have speculated that there have actually been many sorts of humanoid on this planet (Lovecraft, 1928; Witcombe, 2003). Humans have rendered these other sorts of creature as things to be feared, labelling them fae, monsters, and other such pejorative terms (Briggs, 1976), whereas the more powerful beings labelled in Gensokyo as youkai consider other humanoids, specifically humans themselves, as inferior creatures to hunt and kill, even eat as food (Hsskekl, 1949).

While it is now well-established even among well-informed humans that humanoid beings beyond their own species exist (IAPRSH, 1793), a comprehensive collection of information regarding the nature of specific humanoid species has not been made and hence this book has been written to fill the gaps of knowledge for the community of supernatural scientists.

Henceforth, youkai, as Gensokyan terminology refers to them (Yakumo, 1884), will be classified in a binomial manner similarly to the Linnaean classification of non-humanoid animals and humans (Linnaeus, 1753) and their place shall be established within phylogenetic trees in accordance with Willi Hennig's model of grouping creatures with fellow descendants from a common ancestor (Hennig, 1950). However, due to the great extent of hybridisation possible from copulation between differing humanoid species, the biological species concept shall not be used in favour of the morphological species concept.

If the purpose of this book is to be fulfilled, then the information shall be presented in a concise, logical manner, and shall be both a compilation of already established scientific knowledge, as well as novel results of research conducted by the author, Yutaka Hadekawa.

About the Author

Yutaka II Hadekawa is a magician youkai who was born from Kana and Yutaka I Hadekawa in Japan, the outside world. She was born in 1855 and moved to Great Britain in the late 1940s in response to the Hiroshima and Nagasaki bombings. She first began her studies into magic, quantum physics, chemistry, and biology after being given lodging by Mateyuu Dawitsu and being given access to his library.

Ever since, she has developed her own field of magic known as 'terrain manipulation', and has written several small journals that were once unpublished, but have since been put to press by Momiji Publications Ltd at points following the Dawitsu Mansion's entrance into Gensokyo around twenty years ago.

Special Thanks

Yutaka Hadekawa would like to extend thanks to the following people:

Patchouli Knowledge- Without her constant love and support, as well as the occasional kick up the backside, she would not have been able to finish this publication.

Mateyuu Dawitsu- If it was not for him, she would never have had the opportunity to become an academic as she is now.

Momiji Inubashiri- For being willing to publish this book.

As well as you, the reader, for taking an interest in academia. She considers all who take an academic interest the scientists of the future, and believes that a future of science is a very bright one.


Briggs, K. M. (1976), An Encyclopedia of Fairies, New York, Pantheon Books.

Hennig, W. (1950), Basic outline of a theory of phylogenetic systematics, University of Illinois Press.

Hsskekl J. D. W. R. ?. 2. F. (1949), To Serve Man, Nsst grig estehk pket.

International Association for the Protection and Relocation of Supernatural Humanoids, Founder's Meeting (1793).

Linnaeus, C. (1753), Species Planatarium, Laurentius Salvius.

Lovecraft, H. P. (1928), Call of Cthulhu, Weird Tales.

Witcombe, C. L. C. E. (2003), Venus of Willendorf.

Yakumo, Y. (1884), The Gensokyan Charter, Yakumo Publications.