Where does “Horai” come from?

Horai (English) comes from Japanese 蓬莱, from Middle Chinese 蓬萊, from Old Chinese 蓬萊.

Ancestry of “Horai”, step by step

Step	Language	Word	Meaning
1	Japanese	蓬莱	—
2	Middle Chinese	蓬萊	—
3	Old Chinese	蓬萊	—

Horai — Etymology, Origin & Word History | Etymology Explorer