The Meaning of sekai [世界] In Japanese

世界
せかい
Romaji: sekai N4

What does 世界 mean?

Translation and Meaning

world, the world, realm

Definition

世界 (sekai) means “world”; it denotes either the physical planet, the sum of human society, or an abstract domain of experience (such as a professional, cultural, or personal “world”) and is used whenever scope, totality, or a distinct realm is intended.

Type

noun (名詞)

Stroke Order

Meanings

  • 1. The planet or the natural global environment as a geographical/physical entity.
  • 2. The international community or the collective of human societies and nations.
  • 3. A specific sphere of activity or interest (for example, a professional, artistic, or academic “world”).
  • 4. A figurative or subjective domain such as a person’s inner life or social circle.

Origin

The term entered Japanese as a Sino-Japanese compound read with on-yomi readings and appears in classical texts transmitted from Chinese; it became established in written Japanese through Buddhist, Confucian, and premodern literary contexts and was firmly integrated into everyday vocabulary by the medieval period.

Composition

  • 世 (se / yo): generation, society, world — denotes people or an age.
  • 界 (kai): boundary, realm, sphere — denotes a defined domain or limit.
  • Combined, the compound expresses a bounded domain of existence or activity — effectively “the realm (界) of people/generations (世)” which yields the modern sense of “world.”

Usage

世界 (sekai) is used in formal contexts (news, academic writing) to talk about global or societal issues and in casual speech to describe someone’s personal or professional “world.” It frequently appears in compounds to indicate scope or reach and functions naturally with quantifiers and modifiers to express totality, comparison, or perspective.
💡 Tips
Visualize a circle (boundary) drawn around a community of people or generations to form the “world”—世 is the people, 界 is the boundary.

Variations

  • 世間 (seken): the public sphere or common social world
  • 地球 (chikyū): the Earth as a physical planet
  • 宇宙 (uchū): the universe or cosmos (broader than “world”)
  • 内面 (naimen): inner world, inner life (often used as a contrasting term)
世界