The kanji 十 十 primarily represents the number ten. It signifies a complete set, a decade, or a count of ten units. This simple yet fundamental meaning forms the basis for its various applications in Japanese.

・On-yomi (音読み): じゅう (jū), じっ (jiッ) ・Kun-yomi (訓読み): とお (tō)

⚫︎ 十人 (jūnin) Translation: ten people ⚫︎ 十時 (jūji) Translation: ten o'clock ⚫︎ 二十歳 (hatachi) Translation: twenty years old (specifically used for age)

The kanji 十 originated as a simple depiction of a vertical line crossing a horizontal line, representing a cross shape. This cross-like shape was likely intended to represent the concept of ten. Over time, the character simplified to its current form, a single horizontal line with a vertical stroke crossing it. This formation reflects the character's numerical meaning, easily denoting the number ten.