This is the 8950th most frequent Japanese word.
水戸黄門
"水戸黄門" (Mito Kōmon) refers to a legendary historical figure, Tokugawa Mitsukuni, a feudal lord known for justice, often depicted in Japanese folklore and drama.
Here, '水戸黄門' is used as a proper noun, referring to an actual historical figure, Tokugawa Mitsukuni.
水戸黄門は江戸時代の有名な人物です。
Mito Kōmon is a famous figure from the Edo period.
In this instance, '水戸黄門' refers to the persona or character imbued in popular culture, often reenacted or emulated.
子供達は遠足先で水戸黄門ごっこをして遊んでいました。
The children were playing a Mito Kōmon game at their excursion site.
Here, '水戸黄門' is used metaphorically to describe someone who upholds justice and moral conduct, drawing parallels to the traits associated with Tokugawa Mitsukuni.