“Constitutional monarchy” in Japanese
Short answer
Constitutional monarchy in Japanese is “立憲王政” (rikken'ousei). Full meaning: constitutional monarchy.
Other ways to say “Constitutional monarchy” in Japanese
立憲君主制
rikkenkunshusei constitutional monarchy, limited monarchy
立憲君主国
rikkenkunshukoku constitutional monarchy
立憲君主政体
rikkenkunshuseitai constitutional monarchy
Looking for the other direction? Search any Japanese word in the Nihoner lexicon, or practise what you have learned in the learning games.