Astro Boy (Mighty Atom / Tetsuwan Atom)

Ministry of Science (built by Dr. Tenma) · Japan · 1951

Ambassador Atom (1951)

Atomic-powered robot boy built to replace a scientist's lost son, with jet flight, great strength and an unbreakable moral core.

Specifications

Specifications for Astro Boy (Mighty Atom / Tetsuwan Atom), each with its source
Height	1.35 m	[1]
Mass	30 kg	[2]

[1]Wikipedia (Japanese) — 鉄腕アトム · canon · retrieved 2026-08-14“身長135センチ、体重30キログラム。”
[2]Wikipedia (Japanese) — 鉄腕アトム · canon · retrieved 2026-08-14“身長135センチ、体重30キログラム。”

Specifications drift. Each retrieval date is shown so a stale number is visibly stale rather than quietly wrong.