数|かずkazu[1]atamadaka (head-high)

1. nounnumber; amount
   算数さんすうは数かずを取り扱とりあつかう。↗

   Arithmetic deals with numbers.

• Synonym数字すうじNeutralWritten symbols for numbers, as in 「アラビア数字」, or recorded figures in statistics; 「数」 is the count or amount itself, not the symbols.
• Synonym数量すうりょうNeutralCovers count and volume together, as in 「数量限定」; it leans formal, while 「数」 is the everyday word for how many there are.
• RelatedナンバーNeutralA loanword for ID or serial numbers, as in 「車のナンバー」; it never expresses quantity the way 「数」 does.
• Related分量ぶんりょうNeutralHow much by weight, volume, text length, or workload, as in 「仕事の分量」; 「数」 usually refers to count or a numerical value.
• Related量りょうNeutralVolume, capacity, or amount, as in 「量が多い」; it suggests uncountable bulk and contrasts with 「質」, while 「数」 counts things.
• Related数詞すうしWrittenA grammar term, mainly in written prose, for words that express number like 「一」「二」; it names a word class, not quantity itself.

Use 「数」 for the count of things or abstract number, as in 「数が多い」 or 「数の大小」. For bulk or amount use 「量」 or 「分量」, formally 「数量」; 「数字」 is written figures, 「ナンバー」 ID numbers, and 「数詞」 a grammar term.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 物ものの量りょうや大おおきさを表あらわす値あたい。また、1、2、3などの整数せいすう。