単語
たんご
tango
= word; vocabulary; (individual) word; term
There is something wonderfully self-referential about looking up the Japanese word 単語 (tango) — the very act of searching for it means you are doing exactly what it describes: learning a new tango. As the fundamental unit of Japanese vocabulary study, 単語 is the building block every learner encounters before they can form a single sentence.
単語 (tango) refers to an individual word or lexical unit — the smallest meaningful piece of language that can stand on its own. It is the term Japanese learners and teachers use when talking about memorizing or drilling vocabulary items one by one.
It is worth distinguishing 単語 from two related words: 言葉 (kotoba) is a broader concept covering language, speech, and expression in general (“words” in a poetic or emotional sense), while 語彙 (goi) means vocabulary as a collective body — the total stock of words a person or language possesses. 単語 sits between them: it is more specific than 言葉 and is the countable unit that makes up 語彙.
One critical note for English speakers: despite being romanized as “tango,” 単語 has absolutely nothing to do with the Argentine dance. The two words are homophones only in romaji; in Japanese, 単語 is written with completely different kanji and carries an entirely different meaning.
English speakers sometimes do a double-take when they see 単語 romanized as “tango” — but this is purely a coincidence of romanization. The Japanese 単語 and the dance “tango” share no connection whatsoever.
A key compound to learn immediately is 単語帳 (tango-chō), literally “word notebook” — the vocabulary flashcard book that is a staple of Japanese language study at every level. Whether you are drilling kanji readings or JLPT N3 vocabulary, chances are your study materials are organized around 単語.
When counting words in Japanese, you use 単語 with the counter 語 or simply list them: 10個の単語(10 tango, 10 words) or 「単語が多い」(tango ga ōi, there are many words).
単語 is composed of two kanji that together describe its meaning precisely. 単 (tan) means “single” or “simple” — it appears in words like 単純 (tanjun, simple) and 単独 (tandoku, alone/solo). 語 (go) means “language” or “word,” seen in 日本語 (Nihongo, Japanese language) and 物語 (monogatari, story/tale). Combined, 単語 literally means “a single unit of language” — which is exactly what a word is.
Everyday use
毎日10個の単語を覚えるようにしています。
Mainichi jukko no tango wo oboeru yō ni shite imasu.
I try to memorize 10 new words every day.
Casual / Social Media
インスタで英語の単語を毎朝投稿してるアカウントをフォローしてる。
Insuta de Eigo no tango wo mai-asa tōkō shiteru akaunto wo forō shiteru.
I follow an Instagram account that posts English vocabulary words every morning.
Formal / Cultural context
JLPT N2の試験に向けて、単語リストを作成して毎週復習しています。
JLPT N2 no shiken ni mukete, tango risuto wo sakusei shite maishū fukushū shite imasu.
To prepare for the JLPT N2 exam, I have made a vocabulary list and review it every week.
In Japanese education, the 単語帳 (tango-chō) — a compact vocabulary notebook or set of flashcards — is as iconic as a school uniform. English vocabulary drill books like 「速読英単語」(Sokudoku Eitan-go) and 「DUO 3.0」have sold millions of copies and defined how generations of Japanese students approached foreign language learning. The emphasis on memorizing individual 単語 before tackling grammar or conversation reflects a broader test-focused study culture, particularly the rigorous preparation required for university entrance exams.
In recent decades, the analog 単語帳 has met its digital counterpart. Apps like Anki — which uses spaced repetition to schedule 単語 reviews at optimal intervals — have a devoted following among Japanese learners worldwide, and Japanese students themselves use these tools to study English and other languages. The concept of drilling 単語 one card at a time remains unchanged; only the medium has shifted. This continuity shows how deeply the idea of 単語 as the atom of language learning is embedded in Japanese study culture.