1954 (Showa 29) Hiroo Terada, Osamu Tezuka, Fujiko Fujio
Having moved into Tokiwa-so on New Year's Eve 1953 (Showa 28),Hiroo Terada was, once the new year began, in a situation where he was almost exclusively a writer for "Manga Shonen".
Serialized "Dr. Hontokashira" (from the November 1953 issue to the October 1954 issue)
January–August issues Collaboration special (with Saburo Sakamoto, Takemaru Nagata, Akaoni and Aooni Yamane, etc.)
January, February, April, May issues "Picture Manga"
March issue onwards: In charge of the reader submission page "Manga Tsushinbo" (until the magazine ceased publication in October 1955)

"Dr. Hontokashira Research Report" 11 Crow
(Image from "Estoria" Quarterly No. 2, Hiroo Terada Special Feature)
Hiroo Terada and Osamu Tezuka
Osamu Tezuka had been living in the newly completed Tokiwa-so for nearly a year longer than Hiroo Terada (introduced by Kato, an editor at Gakudosha's "Manga Shonen," just like Terada). However, he was already a popular artist with numerous serials. Around April, a reporter from the Weekly Asahi visited Tezuka at Tokiwa-so because he was a manga artist who had appeared on the list of the wealthiest people. Tezuka's serials around January 1954 were as follows (from "Osamu Tezuka and Tokiwa-so" by Yusuke Nakagawa)
"Jungle Emperor", "Manga Classroom" ("Manga Shonen", Gakudosha)
"Astro Boy" ("Shonen", Kobunsha)
"Rock Adventure" ("Shonen Club", Kodansha)
"My Son Goku" ("Manga-O", Akita Shoten)
"Princess Knight" ("Shojo Club", Kodansha)
"Galaxy Boy" ("Omoshiro Book", Shueisha)
"Bean President" ("Boken-O", Akita Shoten)
"Saboten-kun Part 2" ("Shonen Gaho" Shonen Gaho)
However, it seems Hiroo Terada had no particular interest in Osamu Tezuka.
I didn't know about Mr. Tezuka's work until I came to Tokyo.
From New Manga Party "Nanairo-to Garashi" From Yesterday to Tomorrow of Children's Manga (First published in 1961)
I suppose you could say I have a narrow perspective, or rather, I'm not a very curious person. Thinking about it now, a friend from high school told me, 'There's this guy named Osamu Tezuka who draws really interesting manga. If you want to read them, I'll lend you the books,' but I didn't have any desire to read them at all... (omitted) I first learned of Mr. Tezuka after 'Jungle Emperor' started appearing in 'Manga Shonen', and
From an interview with Hiroo Terada
Perhaps even after meeting face-to-face at Tokiwaso, he thought of him as nothing more than "a fellow manga artist who is a little older than me and debuted a little earlier."
In the long letter Terada gave to Fujiko Fujio when they moved into Tokiwaso, which became famous in "Manga Michi," he wrote "Mr. Tezuka" instead of "Tezuka-sensei."
I feel a significant difference in temperature compared to Fujiko Fujio, Shotaro Ishinomori, Fujio Akatsuka, and others who were shocked by "New Treasure Island" and became manga artists out of respect for Tezuka-sensei.
On the other hand, Osamu Tezuka also seemed to have no interest in Hiroo Terada as a manga artist.
Tezuka never failed to keep an eye on manga artists other than himself, including newcomers.
There are many anecdotes about him approaching talented newcomers to ask for help.
In the final episode of "Jungle Emperor" published in the April issue of "Manga Shonen" that year, he asked Fujiko Fujio A (Motoo Abiko) to help him.
In "Manga Michi," this is depicted as an episode after Fujimoto and Abiko moved to Tokyo, but that is too late. If you calculate the schedule for the April issue where the final episode was published, it must have been drawn in February. If Abiko moved to Tokyo in February, it fits perfectly. After staying in Terada's room for a week or ten days, he was called by Tezuka to help.
Also, in the summer of this year, he summoned Shotaro Ishinomori, who was still a high school student in Miyagi, by telegram to help with "Astro Boy."
However, he never once asked Hiroo Terada to be an assistant or anything of the sort.
In the April 1954 issue of "Manga Shonen," there is a section called "Manga Tsushinbo" with Composition: Hiroo Terada, Guest Lecturer: Osamu Tezuka.
It is unclear how much Tezuka was involved, but I don't think Tezuka, who had 17 pages of "Jungle Emperor" and 3 pages of "Manga Classroom" published in the same issue, had the capacity to be heavily involved.
Isn't it likely that the editorial department, thinking that the newcomer Terada couldn't handle it alone, got Tezuka's permission to use his name and characters?

"Manga Tsushinbo" April 1954 issue
Hiroo Terada and Fujiko Fujio
In February, Fujiko Fujio A (Motoo Abiko) visits Tokiwaso alone from Toyama to meet Tezuka.
Terada is asked by the busy Tezuka to look after him.
Eventually, he ends up letting him stay in his room for about a week.
Abiko and Terada, I believe, decided at that time to form a group of newcomer manga artists. Many newcomers come to Tokyo from the provinces, and since manga is a lonely job, we talked about how forming a group would be good for encouraging each other.
From Fujiko Fujio: Nostalgic Tokiwaso Era
June: The two Fujiko Fujio members move to Tokyo. They live in a boarding house in Ryogoku.
July: New Manga Party (First Term) formed
Hiroo Terada, Fujiko Fujio, Saburo Sakamoto, Naoya Moriyasu, Takemaru Nagata
August: Hiroo Terada hospitalized with peritonitis
September: First meeting with Shotaro Ishinomori

From "Biography of Shotaro Ishinomori: Testimony of Youth" by Hiroo Terada
Work gradually increases thanks to collaborations
Perhaps thanks to starting collaborations with Saburo Sakamoto, Takemaru Nagata, and the Akaoni/Aooni Yamane brothers, I gradually became able to get published in magazines other than "Manga Shonen."
Ichinen no Tomo (Toho Shuppan) July Issue
Ninen no Tomo June, July, October, December Issues
Sannen no Tomo July, October, November Issues
Ninen Book (Gakken) July, August Issues

Also, solo work (in magazines other than "Manga Shonen") began to come in from this year.
Kodansha's Manga Picture Book<12> includes a 4-page publication of "Kewpie-chan"
In "Manga Shonen," collaborations under the name "Shin Manga-to" (New Manga Party), which also included Fujiko Fujio, began to be published.
September issue onwards - Collaboration Special: Shin Manga-to 16 pages
October issue onwards - Manga Pictorial 2 pages
The collaboration special consisted of one-shot manga of about 2 pages per person, following a theme decided each month.
"Manga Pictorial" was closer to a collection of cut illustrations than manga.
Both were published every month until the October 1955 issue, when "Manga Shonen" ceased publication.
October - Osamu Tezuka moved out of Tokiwa-so, and the two members of Fujiko Fujio moved into the vacant room. While still a high school student living in Miyagi,
Shotaro Ishinomori made his debut with the new series "Second-Class Angel" starting in the January 1955 issue of "Manga Shonen."
