Translation guide
Describes someone who acts without considering others or the consequences. Japanese offers several nuanced terms depending on whether the lack of thought is due to carelessness, insensitivity, or simple absent-mindedness.
He is a thoughtless person.
Saying something like that, you're really thoughtless.
Means 'person without consideration/compassion'. Emphasizes lack of empathy or thoughtfulness toward others.
She is a thoughtless person.
Refers to someone who lacks consideration or care, often in social or professional contexts. Slightly more formal.
He is a thoughtless person who causes trouble for those around him.
Someone who forgets things, makes careless mistakes, or acts without thinking due to lack of attention.
A person who is careless, forgetful, or prone to making silly mistakes. Often used affectionately or for minor thoughtlessness.
He's a thoughtless person who often forgets his keys.
Describes a hasty, careless person who acts without thinking and makes mistakes. Similar to 'うっかり者' but implies more rashness.
Because he's a thoughtless person, he made another mistake.
Someone who acts impulsively without considering the consequences, often in a dangerous or foolish way.
無神経 focuses on insensitivity to others' feelings, while 思いやりがない emphasizes a lack of compassionate consideration. 無神経 is more about bluntness; 思いやりがない is about not caring.
thoughtless remark
thoughtless attitude
He is a thoughtless person who disregards danger.