Translation guide
How to express that someone leaves a place or thing in a messy, disorganized state, or fails to tidy up after themselves.
To describe that someone leaves a room, house, or area in a messy state, often after using it.
Literally 'leave in a scattered state'. A natural, common way to say someone left a place messy.
The children left the room untidy.
He always leaves the living room untidy.
Emphasizes leaving something messy and not cleaning up afterwards. 'っぱなし' implies neglect.
Don't leave your toys untidy.
More explicit: 'leave as is without tidying up'. Slightly more formal or explanatory.
He left his desk untidy.
To describe leaving objects, clothes, papers, etc. lying around in a messy way.
Transitive verb meaning 'to scatter, to make a mess'. Often used with 'ままにする' or 'っぱなしにする'.
Don't leave your clothes untidy on the floor.
Means 'to leave something lying around' without putting it away. Focuses on the act of not putting away.
Similar to 置きっぱなし, but emphasizes taking something out and not putting it back.
Don't leave your toys out untidy.
Specifically for leaving a bed in an untidy state after sleeping.
Used for Japanese-style futons left out on the floor instead of being put away.
Please don't leave the futon untidy in the morning.
For Western-style beds, meaning 'leave the bed unmade'.
He always leaves his bed untidy.
To describe leaving one's hair or personal appearance in a disheveled state.
ボサボサ is an onomatopoeia for messy, unkempt hair. Natural for casual contexts.
Don't leave your hair untidy in the morning.
More general: 'not groom oneself'. Can be used for overall untidy appearance.
散らかす (transitive) means 'to make a mess', while 散らかる (intransitive) means 'to be/become messy'. Use 散らかす when someone actively leaves things untidy.
The room is untidy (state).
He made the room untidy (action).
Do not translate 'leave' as 去る (to depart) in this context. The focus is on the resulting state of untidiness, not the act of leaving a location.
Don't leave your books untidy on the desk.
He went to work leaving his appearance untidy.