Similar to 4つの最後の歌_(ヴォーン・ウィリアムズ)

Diamond (gemstone)#Gemological characteristics

FourCC

C4 model

Four pillars (Vietnamese bureaucrats)

Four Freedoms

The Four Musketeers (tennis)

Four Books

Four Sages

Humorism

River valley civilization

Four from Planet 5

Fourth Way enneagram

Double (basketball)#Quadruple-double

Four virtues (Mencius)

Four Chaplains