Nihoner

“Armchair theory” in Japanese

Short answer
机上の空論 kijounokuuron kijounokuuron

Armchair theory in Japanese is “机上の空論” (kijounokuuron). Full meaning: armchair theory, impracticable plan, unworkable idea.

Other ways to say “Armchair theory” in Japanese

Looking for the other direction? Search any Japanese word in the Nihoner lexicon, or practise what you have learned in the learning games.