クウゼンゼツゴ
Meanings
Adjective (の)
Noun
Four character compound
1. (so marvelous or horrible that it may be) the first and probably the last
Pitch accent
ウゼンゼ
ツゴ
Composed of
unprecedented; record-breaking
(of a kind) never to be seen again
Examples (1 in total)
On the 11th of March 2011, an unprecedented accident took place in Fukushima.