1The number seven (7); indicating seven units or the seventh in a series. The two main readings are the Sino-Japanese しち and the native-Japanese なな. Because しち is easily confused by ear with 一 (いち) or 四 (し), なな is preferred when clarity matters (e.g. saying phone numbers aloud). In compounds the reading な appears (七日 なのか, 七夕 たなばた as gikun), and parts of the Kansai region pronounce 七 as ひち. The variant 漆 is used in legal documents to prevent forgery.
毎朝七時の電車に乗っています。
I take the seven-o'clock train every morning.
電話番号を伝えるときは、聞き間違いを防ぐために「七」を「なな」と読む。
When giving a phone number, people read 七 as なな instead of しち to avoid being misheard.
結果は七日（なのか）後に発表されます。
The results will be announced in seven days (nanoka).
七夕は七月七日に祝う日本の伝統行事です。
Tanabata is a traditional Japanese festival celebrated on July 7th.
関西では「七時」を「ひちじ」と発音する人もいる。
In the Kansai region, some people pronounce 七時 as ひちじ.
領収書には「金漆万円」と書かれていた。
The receipt was written 金漆万円 (seventy thousand yen) using the legal form of 'seven'.