Martino Hara was one of the vice ambassadors of the Tensho Embassy and was the youngest.

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He was the son of Nakatsukasa HARA, a prominent figure of the Ōmura territory. He intended to become a priest since both of his parents were Christians, and he entered a Seminario (Seminary) in Arima.

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He was fluent in Latin and made a famous speech in Goa thanking Valignano on the way back from Europe.

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Because of the deportation order of Christians in 1614, he left for Macao on the 7th of November.  He died on October 23, 1629. His body was buried in the underground of a cathedral in Macao with his lifetime mentor, Valignano.