noun, noun or participle which takes 'suru', intransitive verb
departure; setting off on a journey
Often used for the start of a significant journey or a new phase in life, carrying a slightly poetic or emotional tone.
いよいよ旅立ちの日が来た。
The day of departure has finally come.
彼の新しい人生への旅立ちを祝
We celebrated his departure into a new life.