Translation guide
Describes something that is not based on reality, is impractical, or is unlikely to happen. Japanese uses different expressions depending on whether you mean 'not realistic' (非現実的), 'impossible' (無理), 'impractical' (現実的でない), or 'fantastical' (非現実的な).
Describing ideas, stories, or depictions that are imaginary or not grounded in real life.
The most direct translation for 'unrealistic' in the sense of being detached from reality. Often used for stories, expectations, or plans.
The movie's story is unrealistic.
Literally 'detached from reality'. Used for things that are too idealistic or out of touch with the real world.
His plan is unrealistic.
Attributive form of 非現実的, used before nouns.
You shouldn't have unrealistic expectations.
Describing goals, demands, or deadlines that cannot be met.
Describing plans or ideas that are not practical or workable in reality.
Describing expectations or hopes that are too good to be true.
非現実的 (higenjitsuteki) is a stronger, more formal word meaning 'unrealistic' in the sense of being fantastical or detached from reality. 現実的でない (genjitsuteki de nai) is a softer, more common phrase meaning 'not practical' or 'not realistic'. Use 非現実的 for stories or ideas, and 現実的でない for plans or suggestions.
Directly translating 'unrealistic' as 非現実的 may sound too stiff in casual conversation. For everyday situations, consider using 無理 (muri) for impossible things, 甘い (amai) for naive expectations, or 現実的でない (genjitsuteki de nai) for impractical ideas.
Also used for impracticality, though slightly more formal.
That idea is unrealistic.