Related words 七 is the standard Japanese numeral for seven used in everyday counting, while セブン is a katakana, English-style form limited to names, labels, and card ranks.
七つ is the native Japanese counter used for objects ('seven things'), while 七 (しち ) is the Sino-Japanese numeral used in counting sequences and compounds like 七月 .
Don't confuse with 七 (しち ) and 一 (いち ) sound similar when spoken quickly, so なな is often used for seven to avoid mishearing it as one.
七 's reading しち can be confused with 四 's reading し , so なな is preferred for seven and よん for four in spoken counting.
Written forms 七 Usage 25% i Usage for this spelling across all readings, not one reading alone.
しち
Standard kanji form for the numeral seven. The reading しち is the most common on'yomi.
なな
Common reading, especially in counting and when avoiding confusion with 一 (いち ) or 四 (し ).
７ Usage 75% i Usage for this spelling across all readings, not one reading alone.
なな Usage <1%
ナナ Usage <1%
シチ Usage 0%
ヒチ Usage 0%
漆
rarely-used kanji form
Etymology The kanji 七 is a pictograph originally representing a cutting or dividing action, later borrowed to represent the number seven. The reading しち comes from Middle Chinese, while なな is the native Japanese reading.
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