Ways to say it
| Japanese | Romanization (Wiktionary) |
|---|---|
| 未知の | michi no |
| 無名な | mumei na |
| 不明な | fumei na |
Japanese uses different words for "unknown" depending on whether you are describing something unexplored, a person without fame or information that is simply unclear.
What does it mean word for word?
The term 未知 (the root of 未知の) combines the characters 未 (not yet) and 知 (to know), literally meaning "not yet known." The term 無名 (the root of 無名な) uses 無 (none/without) and 名 (name) to mean "nameless." Finally, 不明 (the root of 不明な) uses 不 (not) and 明 (clear/bright) to mean "unclear."
Which one should you use?
The choice of word depends on the context of what is unknown: 未知の is used for things that are fundamentally unexplored or undiscovered, such as an unknown land or an unknown phenomenon. 無名な is used specifically for people who are unknown to the public or lack fame. 不明な is used when information is missing, unclear or cannot be determined, such as an unknown cause or an unknown amount.
Related words
How does it change in a sentence?
The noun forms 未知 and 未知数 can be used in mathematical contexts, where 未知数 specifically refers to a variable whose value is to be found.
How do you pronounce it?
michi no
Did you know?
- While English uses 'unknown' for both a person without fame and a mystery, using 未知の (michi no) to describe a person would sound like they are an unexplored territory or an alien phenomenon.
- The word 未知数 'unknown number' is frequently used as a metaphor in daily conversation to describe a person's unpredictable potential or an uncertain outcome of a situation.
- In Japanese horror and urban legends, the concept of the 'unknown' is often linked to 名もなき 'nameless', which implies a sinister or ghostly existence rather than just a lack of fame.
Examples in context
- しかしながら、未知の外国語を聞くとき、我々は異なる単語を聞き分けることができず、発言をほとんど休止のない音の連続であると認識します。However, when listening to an unknown foreign language, our ability to discern different words is lost, and we recognize speech as being a stream of sounds without many pauses.This sentence is useful for illustrating how an unknown foreign language sounds like a continuous stream of sounds when the listener cannot distinguish words.Tatoeba #2458819 by Hirashiki, translation #2458803 by Hirashiki
- この分野はまだ 道標なし の状態です。This field is still in a state of no signposts.
- その件についてはまだ 不明 です。The matter is still unknown.
- それ、まったく 知らない よ。I don't know anything about that.
- 未知の領域に挑戦したいです。Michi no ryōiki ni chōsen shitai desu.I want to challenge unknown territory.
- それは未知の体験でした。Sore wa michi no taiken deshita.It was an unknown experience.
Example conversation
Yota and Yui are talking about a new science project.
- 陽太 Yota未知の現象を研究しています。Michi no genshō o kenkyū shite imasu.I am researching an unknown phenomenon.
- 結衣 Yui陽太さんはとても勇敢ですね。Yōta-san wa totemo yūkan desu ne.You are very brave, Yota.
- 陽太 Yota新しい発見が楽しみです。Atarashii hakken ga tanoshimi desu.I am looking forward to new discoveries.
- 結衣 Yui私も応援しています。Watashi mo ōen shite imasu.I am rooting for you too.
Sources
- Wiktionary, “unknown” translations, CC BY-SA 4.0, dump of 2026-09-26.
- Example sentences: Tatoeba CC BY 2.0 FR.
