(くろこ)

くろこ
noun
stagehand; behind-the-scenes person
culture
1. stagehand (in traditional theater); kuroko
A person dressed entirely in black who assists performers on stage in kabuki or bunraku theater, conventionally treated as invisible by the audience.
The stagehand carries props.
Kabuki stagehands wear entirely black costumes.
舞台(ぶたい)(うえ)黒子(くろこ)()えない」ことになっている。
On stage, the stagehands are conventionally treated as invisible.
2. behind-the-scenes person; someone who works unseen
By extension, someone who operates behind the scenes to make things happen, often without receiving public credit.
He's the one working behind the scenes on this project.
To operate behind the scenes in politics.
Behind every success, there are the efforts of many unsung contributors.

Originally a kabuki theater term. The 黒子(くろこ) wears a full black costume including a hood, based on the convention that black represents invisibility on the traditional Japanese stage. This theatrical concept has become a widely used metaphor in everyday Japanese.

Common collocations

Note on reading

The same kanji 黒子(ほくろ) can also be read ほくろ, meaning "mole" (the skin mark). Context makes the reading clear.

Cultural note

The convention of "invisible" stagehands reflects a unique aspect of Japanese theater aesthetics — the audience agrees to ignore their presence, even though they are in plain sight. This cultural concept extends to the figurative use.