Translation guide
The English phrase 'be lost in' can describe being deeply absorbed in an activity or thought, or physically losing one's way inside a place. This guide covers natural Japanese expressions for both meanings.
To be so deeply engaged in something that you lose awareness of your surroundings.
A common and natural way to say you are absorbed in something, often with a sense of enthusiasm or obsession.
He is lost in the game.
To be unable to find your way within a building, forest, city, etc.
The standard way to say you are lost in a place, especially for children or in large public spaces.
Do not directly translate 'be lost in' as 〜に失われる or 〜にロストする. These are unnatural and incorrect. Use the phrases above depending on the intended meaning.
She was so lost in her book that she lost track of time.
A more formal or literary expression for being deeply immersed in an activity, often used for work or study.
He is lost in his research.
Implies being immersed in an atmosphere, emotion, or experience, like being lost in thought or nostalgia.
She was lost in her memories.
He is lost in thought.
Literally 'to forget oneself in something', used when someone is so absorbed they lose self-control or awareness. Stronger and more dramatic.
He was lost in anger.
I got lost in the department store.
More general for losing your way, often used for streets, forests, or unfamiliar areas.
I got lost in the forest.
I ended up lost in an unfamiliar town.
A shorter, more casual way to say you are lost or wandering in a place.
I got lost in the station.