noun
paulownia crest (5-7 pattern)
A traditional Japanese crest featuring paulownia leaves and blossoms: three leaves, with seven blossoms on the center leaf and five on each side leaf. Often associated with the imperial family and government.
五七桐は、内閣総理大臣の紋章としても使われている。
The 5-7 paulownia crest is also used as the emblem of the Prime Minister of Japan.
Another paulownia crest with five blossoms on the center leaf and three on each side leaf; 五七桐 is considered higher in rank.
From 五 (five), 七 (seven), and 桐 (paulownia), referring to the number of blossoms on the leaves in the crest design.