noun
unbroken imperial line
A yojijukugo referring specifically to the Japanese imperial line, which is traditionally held to have continued unbroken since ancient times. Used in historical, political, or ceremonial contexts.
万世一系の天皇は、日本国憲法において象徴とされている。
The emperor of the unbroken imperial line is defined as a symbol in the Constitution of Japan.
A yojijukugo composed of 万世 (bansei, 'eternity, all ages') and 一系 (ikkei, 'one lineage'). The exact historical origin of the phrase is uncertain, but it has been used to describe the traditional concept of the Japanese imperial succession.