Transgender Mangakas part 1
Manga
Mangas with transgender authors and/or illustrators. Not all the mangas have transgender themes in them.
Part 2: https://myanimelist.net/stacks/54374
Not on MAL (yet):
Ayana Tsubaki (trans woman) (author)
Watashi, Danshikou Shusshin Desu. Comic
Yoriko Kamikawa (trans woman) (author)
Sayonara Chinchin Welcome Manman ~OL ni naritakute Seibetsu Tekigou Shujutsu shita~
Keito Gaku (trans man) (author and illustrator)
Akarui
Chii (trans woman) (author and illustrator)
Majo ni Naritai Otoko no Ko
Manga de Wakaru: Taino SRS (Seitenkan・Seibetsu Tekigou Shujutsu)
Mofu☆Mofu: Ichigo Aji (that one's on MAL- I just can't add it for some reason)
Trans shojo-chan (trans woman) (author and illustrator)
Mirai kara kita Jibun ni Onna ni naru you Settaku Sarersu Hanashi
Danshi Jidai no mtf no Manga/Koukousei Hen
Asuka Miyazaki (x-gender) (author and illustrator)
Kyouhaku sei Shougai desu!
Kyouhaku sei Shougai Chiryou Nikki
Shou Arai (intersex man) (author and illustrator)
"Seibetsu ga, Nai!" Hito-tachi no Hoken Taiiku
Anokoro Ore wa Joshikousei
Asia wo Futari de Aruite Mita - Chuusei Oji-san to Otokonoko no Ryokouki
Chuusei Furo e Youkoso!
Ore no Mawari no "Seibetsu ga, Nai!" Hitotachi - Arai Shou no Sekumai Kouyuuroku
Saikin sa Otona to Wakamono ga sa... Suggoi Chigaku ne!?
Seibetsu ga, Nai!
Seibetsu R!
Seibetsu x Renai Hakusho
Kazuki (x-gender) (author)
Onna no Karada ga Iya nano de Mune wo Torimashita
Poppy Pesuyama/Stunning Sawamura (x-gender) (author and illustrator)
Sasada wa Tomodachi
Sumire Nekobungi (trans woman) (author and illustrator)
Azami on the Tail
Sashimi Forest
Doppel Debussy
Alice Sherlock: The Rubious Nebula
Basilico no Mahoutsukai
Ame no Machi no Teru
Felismans no Kuni
Matenrou no Locusta
Kaifuu no Silhouette
Part 2: https://myanimelist.net/stacks/54374
Not on MAL (yet):
Ayana Tsubaki (trans woman) (author)
Watashi, Danshikou Shusshin Desu. Comic
Yoriko Kamikawa (trans woman) (author)
Sayonara Chinchin Welcome Manman ~OL ni naritakute Seibetsu Tekigou Shujutsu shita~
Keito Gaku (trans man) (author and illustrator)
Akarui
Chii (trans woman) (author and illustrator)
Majo ni Naritai Otoko no Ko
Manga de Wakaru: Taino SRS (Seitenkan・Seibetsu Tekigou Shujutsu)
Mofu☆Mofu: Ichigo Aji (that one's on MAL- I just can't add it for some reason)
Trans shojo-chan (trans woman) (author and illustrator)
Mirai kara kita Jibun ni Onna ni naru you Settaku Sarersu Hanashi
Danshi Jidai no mtf no Manga/Koukousei Hen
Asuka Miyazaki (x-gender) (author and illustrator)
Kyouhaku sei Shougai desu!
Kyouhaku sei Shougai Chiryou Nikki
Shou Arai (intersex man) (author and illustrator)
"Seibetsu ga, Nai!" Hito-tachi no Hoken Taiiku
Anokoro Ore wa Joshikousei
Asia wo Futari de Aruite Mita - Chuusei Oji-san to Otokonoko no Ryokouki
Chuusei Furo e Youkoso!
Ore no Mawari no "Seibetsu ga, Nai!" Hitotachi - Arai Shou no Sekumai Kouyuuroku
Saikin sa Otona to Wakamono ga sa... Suggoi Chigaku ne!?
Seibetsu ga, Nai!
Seibetsu R!
Seibetsu x Renai Hakusho
Kazuki (x-gender) (author)
Onna no Karada ga Iya nano de Mune wo Torimashita
Poppy Pesuyama/Stunning Sawamura (x-gender) (author and illustrator)
Sasada wa Tomodachi
Sumire Nekobungi (trans woman) (author and illustrator)
Azami on the Tail
Sashimi Forest
Doppel Debussy
Alice Sherlock: The Rubious Nebula
Basilico no Mahoutsukai
Ame no Machi no Teru
Felismans no Kuni
Matenrou no Locusta
Kaifuu no Silhouette
Shimanami Tasogare
Our Dreams at Dusk: Shimanami Tasogare

Manga, 4 vol, 2015
Me:-
Author:8
Yuhki Kamatani (x-gender and intersex) (author and illustrator)

Manga, 14 vol, 2004
Me:-
Author:-
Yuhki Kamatani (x-gender and intersex) (author and illustrator)
Shounen Note
Shonen Note: Boy Soprano

Manga, 8 vol, 2010
Me:-
Author:7
Yuhki Kamatani (x-gender and intersex) (author and illustrator)
Hiraeth wa Tabiji no Hate
Hiraeth: The End of the Journey

Manga, 3 vol, 2020
Me:-
Author:-
Yuhki Kamatani (x-gender and intersex) (author and illustrator)

Manga, 1 vol, 2005
Me:-
Author:-
Yuhki Kamatani (x-gender and intersex) (author and illustrator)

Manga, ? vol, 2013
Me:-
Author:-
Yuhki Kamatani (x-gender and intersex) (author and illustrator)
Hanayome wa Motodanshi.
The Bride Was a Boy

Manga, 1 vol, 2016
Me:-
Author:8
Chii (trans woman) (author and illustrator)
Seibetsu X
X-Gender

Manga, 2 vol, 2020
Me:-
Author:7
Asuka Miyazaki (x-gender) (author and illustrator)

Manga, 1 vol, 2016
Me:-
Author:8
Mafuyu Konishi (trans woman) (author and illustrator)

Manga, 1 vol, 2017
Me:-
Author:-
Mafuyu Konishi (trans woman) (author and illustrator)
Jibun no Karada wo Yurusu made
Until I Love Myself: The Journey of a Nonbinary Manga Artist

Manga, 2 vol, 2020
Me:-
Author:7
Poppy Pesuyama (x-gender) (author and illustrator)

Manga, 2 vol, 2017
Me:-
Author:-
Poppy Pesuyama (x-gender) (author and illustrator)
Boku ga Watashi ni Naru Tame ni
My Journey to Her

Manga, 1 vol, 2016
Me:-
Author:8
Yuuna Hirasawa (trans woman) (author and illustrator)
Kagi-tsuki Terrarium
The Terrarium With Key

Manga, 4 vol, 2017
Me:-
Author:-
Yuuna Hirasawa (trans woman) (author and illustrator)
Ryuui no Luca
Luciana, Dragon Veterinarian

Manga, ? vol, 2022
Me:-
Author:-
Yuuna Hirasawa (trans woman) (author and illustrator)

Manga, 2 vol, 2018
Me:-
Author:-
Yuuna Hirasawa (trans woman) (author and illustrator)

Manga, 1 vol, 2011
Me:-
Author:-
Reo/Leo Yabuki (gender questioning) (author and illustrator)
30-sai de "Seibetsu ga, Nai!" to Hanmei shita Ore ga Around Fifty ni Natte Wakatta Koto.
At 30, I Realized I Had No Gender: Life Lessons from a 50-Year-Old After Two Decades of Self-Discovery

Manga, 1 vol, 2019
Me:-
Author:7
Shou Arai (intersex man) (author and illustrator)
Haikei, Sekensama.
Dear, the World.

Manga, 3 vol, 2022
Me:-
Author:7
Shin Kanzaki (trans man) (author and illlustrator)

Manga, 2 vol, 2013
Me:-
Author:-
Shin Kanzaki (trans man) (author and illlustrator)

Manga, ? vol, 2023
Me:-
Author:7
Half-me (trans woman) (author and illustrator)

Manga, 1 vol, 2018
Me:-
Author:-
Ayumu Watanabe (trans man) (author and illustrator)
Fushigi Yuugi
Fushigi Yugi

Manga, 18 vol, 1992
Me:-
Author:-
Yuu Watase (x-gender) (author and illustrator)
Ayashi no Ceres
Ceres: Celestial Legend

Manga, 14 vol, 1996
Me:-
Author:-
Yuu Watase (x-gender) (author and illustrator)
Arata Kangatari
Arata: The Legend

Manga, 24 vol, 2008
Me:-
Author:-
Yuu Watase (x-gender) (author and illustrator)

Manga, 1 vol, 2005
Me:-
Author:-
Yuu Watase (x-gender) (author and illustrator)
Oishii Study
Delicious Study

Manga, 1 vol, 1997
Me:-
Author:-
Yuu Watase (x-gender) (author and illustrator)

Manga, 3 vol, 1990
Me:-
Author:-
Yuu Watase (x-gender) (author and illustrator)
Suna no Tiara
Sand Tiara

Manga, 1 vol, -
Me:-
Author:-
Yuu Watase (x-gender) (author and illustrator)
Zettai Kareshi.
Absolute Boyfriend

Manga, 6 vol, 2003
Me:-
Author:-
Yuu Watase (x-gender) (author and illustrator)

Manga, 2 vol, 2008
Me:-
Author:-
Yuu Watase (x-gender) (author and illustrator)