Fungus and Iron

Fungus and Iron (Japanese: 菌と鉄, Hepburn: Kin to Tetsu) is a Japanese manga series written and illustrated by Ayaka Katayama. It began serialization in Bessatsu Shōnen Magazine in March 2021. As of April 2025, the series' individual chapters have been collected into seven volumes.

Fungus and Iron
First tankōbon volume cover
菌と鉄 (Kin to Tetsu)
Genre	Adventure[1] Dark fantasy[2] Science fiction[1]
Manga
Written by	Ayaka Katayama
Published by	Kodansha
English publisher	NA: Kodansha USA
Magazine	Bessatsu Shōnen Magazine
Original run	March 9, 2021 – present
Volumes	7

Publication

Written and illustrated by Ayaka Katayama, the series began serialization in Kodansha's Bessatsu Shōnen Magazine on March 9, 2021.^[3] In August 2021, the series went on hiatus due to Katayama going on maternity leave; the series resumed serialization in March 2022.^[4] As of April 2025, the individual chapters have been collected into seven tankōbon volumes.^[5]

In January 2022, Kodansha USA announced that they licensed the series for English publication.^[6]

Volumes

No.	Original release date	Original ISBN	English release date	English ISBN
1	July 9, 2021[7]	978-4-06-523583-6	February 8, 2022[1]	978-1-63-699604-2
2	June 9, 2022[8]	978-4-06-528162-8	February 14, 2023[9]	978-1-68-491568-2
3	November 9, 2022[10]	978-4-06-529645-5	May 9, 2023[11]	978-1-68-491932-1
4	June 8, 2023[12]	978-4-06-531870-6	October 24, 2023[13]	979-8-88-933196-4
5	January 9, 2024[14]	978-4-06-534164-3	June 11, 2024[15]	979-8-88-933564-1
6	October 8, 2024[16]	978-4-06-537048-3	February 25, 2025[17]	979-8-89-478374-1
7	April 9, 2025[5]	978-4-06-539037-5	—	—

Reception

Christopher Farris from Anime News Network offered praise for the setting-up of the story in the first volume, though felt the artwork was a bit amateurish in places.^[18] Kazuhiko Otoguro, an editor at Bessatsu Shōnen Magazine, picked the series as his favorite manga from 2021.^[2]