Since its first appearance in the second episode of the Japanese TV show "Ultraman" (1966), "Shoot the Invaders," it has appeared many times in the series and is one of the most popular aliens.

I'm sure most Japanese people know it, right?

Just to be sure, it might be a good idea to add the reinforcing word "Crayfish's scissor-like hands."

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『ウルトラマン』(1966)第2話「侵略者を撃て」で初登場以後シリーズに度々登場し、屈指の人気を誇る宇宙人です。

ひょっとしたら日本人の殆どが知ってるんじゃない？

念の為、補強ワードとして

"Crayfish's scissor-like hands"

と入れたほうがいいかもしれません。