Translation guide
In Japanese, the concept of 'a thousand years' is most commonly expressed with the word 千年 (sennen). It can be used literally for a millennium, or figuratively to mean 'a very long time'. There are also more poetic or literary expressions, and some set phrases.
Referring to an actual span of 1000 years, such as in history or future projections.
The standard word for 'a thousand years' or 'millennium'. Used in both spoken and written Japanese.
この寺院は千年以上前に建てられました。
This temple was built over a thousand years ago.
千年に一度の祭典が開かれた。
A once-in-a-millennium festival was held.
Literally 'one thousand years'. Slightly more emphatic or formal than 千年 alone. Often used in historical or scientific contexts.
一千年の時を経て、その文書が発見された。
After a thousand years, the document was discovered.
Loanword from English 'millennium'. Used mainly in modern or Western contexts, like the turn of the millennium.
ミレニアムを祝うイベントが各地で行われた。
Events celebrating the millennium were held in various places.
Expressing that something feels like it lasts forever, or has existed for an extremely long time.
Adding も to 千年 emphasizes the length, like 'as long as a thousand years' or 'for a thousand years (and still...)'. Often used in emotional or poetic statements.
あなたを千年も待っていたような気がする。
I feel like I've been waiting for you for a thousand years.
A poetic phrase meaning 'across a thousand years' or 'transcending a millennium'. Used in songs, literature, or dramatic speech.
千年の時を超えて、愛は生き続ける。
Across a thousand years, love lives on.
Fixed expressions where 'thousand years' is part of a larger meaning.
A four-character idiom meaning 'a thousand years like a single day'. Describes a long period that feels short, or something unchanging over time.
彼の研究生活は千年一日のごとく続いた。
His life of research continued as if a thousand years were but a single day.
A proverb: 'Cranes live a thousand years, turtles ten thousand years.' Used to wish someone a long life.
おじいちゃん、鶴は千年、亀は万年というから、まだまだ元気でいてね。
Grandpa, they say cranes live a thousand years and turtles ten thousand, so stay healthy for a long time yet.
While 千年 means 'a thousand years', the English word 'millennium' often refers specifically to the turn of the millennium (year 2000) or a future thousand-year period in a Western cultural sense. In such cases, ミレニアム is more natural. 千年 is better for general spans of 1000 years.
An ancient, highly poetic phrase from the Japanese national anthem and classical poetry, meaning 'for a thousand generations, for eight thousand generations' – essentially 'for eternity'. Not used in daily conversation.
君が代は千代に八千代に。
May your reign last for a thousand, for eight thousand generations.