1.
setting sun, declining sun
The sun as it sets in the west, casting long shadows.
2.
decline, waning
A state of declining prosperity, power, or relevance, often used to describe industries, families, or eras.
A literary word evocative of decline. Made famous by Dazai Osamu's novel『斜陽』(The Setting Sun, 1947), which depicts the decline of an aristocratic family after World War II.
Common collocations
Cultural note
The term 斜陽族 was coined after Dazai's novel to describe aristocratic families who lost their status and wealth after the war.