noun
Wasei-eigo term derived from English 'echo room', referring to an environment where a person only encounters opinions that reinforce their own, often used in the context of social media or online communities.
wasei-eigo (Japanese-coined English), from echo room
See also: エコーチェンバー
SNSは時にエコールームになりがちだ。
Social media can easily become an echo chamber.
同じ意見ばかり集まるエコールームから抜け出すのは難しい。
It's hard to break out of an echo chamber where only the same opinions gather.