Translation of "Pioneer" in Japanese

He is what we call a pioneer.

彼はいわゆる先駆者だ。

Pioneer men and women had a hard life, and so did their children.

開拓者達は辛い生活をしたし、彼等の子供もそうだった。

- He is a trailblazer in this field.
- He was a pioneer in this field.

彼はこの分野では草分けだ。