- Creator Backlash: Imagawa disliked the 2007 movie due to the movie being rushed and seemly messed-up.
- Fan Nickname:
- Ol' Needlenose for Gigantor himself.
- "Wrong Tetsujin" for the 1980's incarnation and "Wrongest Tetsujin" for FX due to the works difference from the original (These versions were produced by TMS Entertainment so they were distant from the original similar to Godmars). The fan name was originally fan reaction about the 1980's series debut in the Super Robot Wars Z2 (Saisei-hen) instead of the original. This in turn lead to "Right Tetsujin" for both the original and the 2004 series.
- Chen Gong, an /m/ translator for the Super Robot Wars series, calls Uchuu Maoh / Moldark from the '80s Tetsujin series "Space Dad" because he's the father of Prince Gura, another villain from that series, and because he's a living black hole.
- He Also Did: Hayao Miyazaki was involved in the 1980's version, though only in the 8th episode of it.
- The Other Darrin:
- In Super Robot Wars Z3: Jigoku-hen & Tengoku-hen, Kenji Utsumi recorded lines for Hades before his passing, but not Uchuu Maoh, thus Yusaku Yara provides his voice for the latter.
- This was the same case in Super Robot Wars Z2: Saisei-hen wherein Ikuya Sawaki replaced Osamu Kobayashi as Branch's seiyuu due to Kobayashi's death a year ago before the game was released.
- Similarly in Super Robot Wars Z3, Mitsuki Saiga took over Keiko Toda's voice role as Gura.
- Playing Against Type: The protagonist of FX, Masato Kaneda is voiced by Yusuke Numata who usually voices villains or supporting roles, but never voices the main character, this is the only time he did and it kinda shows in his performance.
- Referenced by...:
- Appears in Super Robot Wars Z2 Saisei-hen, based on the 1980's TV Series followed by Super Robot Wars Z3: Jigoku-hen and Tengoku-hen.
- One of the Bonus scenario of Z3, featured this '80s incarnation tie-in with Godmars.
- The animé version of Kare Kano used the ending theme to both the 1963 and 2004 versions as the series' recap theme
- What Could Have Been:
- For the 1980's series, it was originally intended to be a sequel of the 1963 version of Tetsujin-28 however, it ended up being a complete remake of it. note
- The English dub version of the 1980's series was slated to be released in home video via LIVE Entertainmentnote (as reported by Fred Ladd in the late '90s) but due to the death of Mitsuteru Yokoyama, chances of this became impossible.
Trivia / Gigantor