Where does “日本刀” come from?

日本刀 (Japanese) comes from Japanese 日本, from Japanese 日, from Old Japanese 日, from Proto-Japonic *pi — day, sun.

日本刀 (Japanese): a Japanese sword

Definitions

  1. a Japanese sword

Ancestry of “日本刀”, step by step

日本刀 traces back through two separate lines of ancestry.

via Japanese 日本

StepLanguageWordMeaning
1Japanese日本{{l|en|Japan}}; Japan
2JapaneseSunday
3Old Japanesethe sun; sunlight, sunshine; daytime, daylight
4Proto-Japonic*piday, sun

via Japanese

StepLanguageWordMeaning
1Japanesea single-edged sword, such as a katana; a small...
2Japaneseused to get someone's attention, generally...
3Japaneseemphasis and question marker particle; asks for...
Every word from Proto-Japonic *piEvery word from Old Japanese Every word from Japanese