What does "zailai" in Taiwan's zailai rice actually mean?

Question

AhaDaily · Accepted Answer

Japanese for already here Zailai is Japanese for already here: it names the long-grain rice Taiwan grew before the Japanese era. In 1926 the Japanese governor named Taiwan's new sticky japonica rice, penglai rice. The older long-grain rice, farmed since the 1600s, was labeled zailai, Japanese for already here. So the Japanese name marks the true native, the rice in turnip cake.

What does "zailai" in Taiwan's zailai rice actually mean?

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