父(ちち) chichiは wa１５ 15歳(さい) saiで de船(ふな)乗(の)り()に()な()っ()た() funanorininatta。 My father became a sailor at 15. Literal Father [topic-は] 15-years-old [at-で] sailor [into-に] became. 船乗り ('sailor') is a native Japanese compound: 船 (ship) + 乗り (rider). ~になった marks the change of occupation. で marks the age at which the change occurred. ageworkfamily~になる (become)
父(ちち) chichiは wa１５ 15歳(さい) saiで de船(ふな)乗(の)り()に()な()っ()た() funanorininatta。 My father became a sailor at 15. Literal Father [topic-は] 15-years-old [at-で] sailor [into-に] became. 船乗り ('sailor') is a native Japanese compound: 船 (ship) + 乗り (rider). ~になった marks the change of occupation. で marks the age at which the change occurred. ageworkfamily~になる (become)