太古

Japanese JLPT N1 Vocabulary Japanese ★★★ 3/5 neutral たいこtaiko
読み たいこ
ローマ字 taiko
漢字の分解 太 (tai) — great, vast, thick; 古 (ko/furu) — old, ancient
発音 /tai.ko/

意味

Ancient times; the remote past; time immemorial. Refers to an era so distant it lies beyond the reach of recorded history.

太古 evokes a sense of mythic or geological antiquity, typically referring to prehistoric or primordial time rather than any specific era. It contrasts with 古代 (ancient times with historical records) by suggesting a more indefinite, cosmic deep past. Often used in literary, philosophical, or scientific contexts to convey vast temporal scales — the age of the earth, the birth of the universe, or the origins of human life.

例文

  1. 太古の昔、この大陸はひとつにつながっていたと考えられている。
  2. 洞窟の壁画には太古の人々の生活の痕跡が残されていた。
  3. 太古から続く自然の営みは、人間の歴史などとは比較にならないほど長い。

使い方ガイド

場面: history, literature, science, geology

トーン: poetic

起源と歴史

Compound of 太 (great, vast) + 古 (old, ancient). 太 amplifies the remoteness beyond ordinary antiquity, placing 太古 at the very limits of imaginable time.

文化的背景

時代: Prehistoric

世代: Adults

社会的背景: Universal

関連フレーズ

年度 Fiscal year; academic year; official year. A defined annual period used for administrative, educational, or financial purposes, often not aligned with the calendar year. 昭和 The Shōwa era; the imperial reign period of Emperor Hirohito, spanning 1926 to 1989. One of the longest and most historically eventful eras in Japanese history. 歴史的 Historic; historical. Describes something of great historical significance, or something related to history in general. 元号 Era name; the official name given to a reign period in the Japanese imperial system. Japan currently uses the era Reiwa, which began in 2019. 干支 The Chinese zodiac; the traditional sexagenary cycle combining the ten Heavenly Stems and twelve Earthly Branches. Also used colloquially to refer to one's zodiac animal sign. 年号 Era name; Japanese era designation. An official name given to a reign period in the traditional Japanese calendar system. 年度末 End of the fiscal year or academic year; year-end in the Japanese administrative calendar. Typically refers to late March. 戦前 Pre-war; the period before a war. In Japanese, typically refers to Japan before World War II, particularly before 1937 or 1941.
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