Born In The Year Of Courage by Emily Crofford

Based on the true story of Nakahama Manjiro, a poor Japanese fisher boy shipwrecked in 1841 who is rescued by an American whaling captain and taken to New England, where he learns English, goes to school, and navigates cultural barriers; years later he ventures to sea and to the California goldfields, then risks returning to isolationist Japan, using his rare knowledge to help connect two worlds.