Where does “武士道” come from?

武士道 (Japanese) comes from Japanese 道, from Middle Chinese 道 — way.

武士道 (Japanese): bushido

Definitions

Step	Language	Word	Meaning
1	Japanese	道	Tao , Taoism; a region of Japan consisting of...
2	Middle Chinese	道	way

武士道 — Etymology, Origin & Word History | Etymology Explorer