This post is intended to be informative for both old timers in Japanese fictional works and new comers.

                                                              **STREET FASHION**  

Lolita
http://www.fyeahlolita.com/2013/11/why-is-lolita-called-lolita-does-lolita.html afterwords check out this short post about natural-kei https://kero-chan42.livejournal.com/49994.html
https://penguinlolita.weebly.com/types-of-lolita.html
http://www.lolitaguidebook.com/lolita-substyles/
https://hypebeast.com/2018/5/guro-yami-kawaii-fashion-subculture-explained?utm_source=Japanese%20Subcultures%20You%27ve%20Never%20Heard%20of%3A%20Guro%20Lolita%20%26%20Yami%20Kawaii&utm_medium=social&utm_campaign=share%20buttons

Lolita: Dreaming, Despairing, Defying by Terasa Younker https://d1wqtxts1xzle7.cloudfront.net/33840753/Japan5-with-cover-page-v2.pdf?Expires=1651943176&Signature=Gv~Zlb4ibhbLf1zW92SXFaOGjzurcJ22gWbXAEiGPs3qpmHb5hC0-erCVpui-5ie-y~cA7MJLF01zUKZwmS~AUmuPZOXqzbQkpw~m1ioy8ObtlD3D8zbOsHx-OhHRhgeBLNZvgAAUh~YUQQcelqkT5Q7IPupsNzX~WsMdeD4zSvEenSv8~pV25js-BP4eFmXJPQuwc5haWrPWCK9vf9TlF2bifhIsH1TrJzSY4ON0kq~j4WfNXzxvFKJiR3QpX-I~y98yvuPmCtQ32-HEK3siMwUqsy1iUXUeB1u18OaWrKCVxV9q8N-TCTK0L7cuBhQnLcYe19Bcafx97xUTdtGhw__&Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA

Ethnographic Comparison of a Niche Fashion Group, Lolita by Bayli Berry http://fau.digital.flvc.org/islandora/object/fau%3A39739

Transcultural Flow of Demure Dynamics: Examining Cultural Globalization through Gothic & Lolita Fashion by Masafumi Monden https://newvoices.org.au/newvoices/media/JPF-New-Voices-Vol-2.pdf#page=30

Consuming Hello Kitty: Saccharide Cuteness in Japanese Society by Kimberlee Coombes https://repository.wellesley.edu/object/ir695

Gender Bending In Anime, Manga, Visual Kei and Lolita Fashion https://www.redalyc.org/pdf/3537/353744579001.pdf

So Pretty/Very Rotten by Jane Mai and An Nguyen ISBN 978-1-927668-43-6

Performing Lolita: The Japanese Gothic and Lolita Subculture
and Constructing Identity through Virtual Space by Kathryn Hardy Bernal
https://muse.jhu.edu/article/675394/pdf

Urban Princesses: Performance and "Woman's Language" in Japan's Gothic/Lolita Subculture by Isaac Gagné
https://www.jstor.org/stable/43104179

Gyaru
https://haenfler.sites.grinnell.edu/subcultures-and-scenes/gyaru/
https://tulip-e.com/en/blog/history-of-gyaru-style/
http://neojaponisme.com/2012/02/28/the-history-of-the-gyaru-part-one/
http://neojaponisme.com/2012/05/08/the-history-of-the-gyaru-part-two/
http://neojaponisme.com/2012/06/06/the-history-of-the-gyaru-part-three/

Those Naughty Teenage Girls: Japanese Kogals, Slang, and Media Assessments by Laura Miller
https://www.researchgate.net/publication/216842416_Those_Naughty_Teenage_Girls_Japanese_Kogals_Slang_and_Media_Assessments

                                                       **GANGS, ORGANIZED CRIME & DELIQUENTS**

Yanki
https://www.japan-talk.com/jt/new/yanki
https://www.japantimes.co.jp/life/2002/07/05/language/our-yankii-are-different-from-your-yankees/
https://timeline.com/yankii-subculture-japan-american-c51808fa2172
https://www.nippon.com/en/in-depth/a03202/

Bōsōzoku
https://think.iafor.org/bosozuku-society-politics-and-terror/

The Public Perception of the Bōsōzoku in Japan by Andreas Riessland
https://rci.nanzan-u.ac.jp/jinruiken/publication-new/item/ronshu1-09%20Riessland.pdf

Interview with Andreas Riessland: What Happens When Fieldwork Fails?
https://asianethnology.org/page/podcastriessland

https://www.highsnobiety.com/p/bosozoku-japanese-gangs-fashion/
https://haenfler.sites.grinnell.edu/subcultures-and-scenes/bosozoku/

• Mobilizing Japanese Youth: The Cold War and the Making of the Sixties Generation* by Christopher Gerteis ISBN 9781501756313
  Kamikaze Biker: Parody and Anomy in Affluent Japan by Ikuya Sato ISBN 9780226735252

Yakuza
https://www.britannica.com/topic/yakuza
The Japanese Mafia: Yakuza, Law, and the State by Peter E. B. Hill ISBN 978-0199291618

Global Vice: The Expanding Territory of The Yakuza & The Last Yakuza by Jake Adelstein
https://www.jstor.org/stable/24388258 https://www.jstor.org/stable/27870341

Yakuza: The Warlords of Japanese Organized Crime by Lt. Bruce A. Gragert
https://digitalcommons.law.ggu.edu/cgi/viewcontent.cgi?article=1034&context=annlsurvey

WILL POST MORE SECTIONS AT LATER DATE

It's great I havent read it full nor checked all the links but "Transcultural Flow of Demure Dynamics: Examining Cultural Globalization through Gothic & Lolita Fashion" looks very interesting ,the other university paper also caught my eye..