Where does “七五三” come from?

七五三 (Japanese) comes from Japanese 七, from Old Japanese 七, from Old Japanese なの.

七五三 (Japanese): The Japanese festival for children; a traditional rite of passage and festival day in Japan for three- and seven-year-old girls and three- and five-year-old boys, held annually on November 15. As Shichigosan is not a national holiday, it is generally observed on the nearest weekend. Similar to こどもの日

Definitions

The Japanese festival for children; a traditional rite of passage and festival day in Japan for three- and seven-year-old girls and three- and five-year-old boys, held annually on November 15. As Shichigosan is not a national holiday, it is generally observed on the nearest weekend. Similar to こどもの日

Ancestry of “七五三”, step by step

七五三 traces back through 3 separate lines of ancestry.

via Japanese 七

Step	Language	Word	Meaning
1	Japanese	七	seven, 7; a seven; a gambler
2	Old Japanese	七	seven, 7
3	Old Japanese	なの	—

via Japanese 三

Step	Language	Word	Meaning
1	Japanese	三	three, 3; third; three
2	Middle Chinese	さん	—

via Japanese 五

Step	Language	Word	Meaning
1	Japanese	五	five; a name of a hole of a wind instrument
2	Middle Chinese	ご	—

Words derived from “七五三”

Shichi-Go-San

Every word from Old Japanese なの →Every word from Old Japanese 七 →Every word from Japanese 七 →