Translation guide
The English word "shady" can describe literal shade, suspicious character or behavior, and questionable reliability. This guide covers natural Japanese expressions for each meaning.
Describing a person, business, or deal that seems untrustworthy, possibly illegal or unethical.
The most common and versatile word for 'shady' in the sense of suspicious, dubious, or questionable. Can describe people, situations, or things.
あの人はちょっと怪しい。
That person seems a bit shady.
怪しい取引に巻き込まれた。
I got involved in a shady deal.
Stronger than 怪しい, implies something smells fishy or is clearly dubious. Often used for people or offers that seem too good to be true.
その話は胡散臭いと思った。
I thought that story sounded shady.
Implies indecency or immorality, often used for shady businesses like adult entertainment or dubious products.
いかがわしい店が並ぶ通り
a street lined with shady shops
Literally 'black', but can mean shady in the sense of illegal or underhanded, often in compounds like 黒い噂 (dark rumors).
あの会社は黒い噂が絶えない。
That company is always surrounded by shady rumors.
Describing something that may not work properly, is of low quality, or is unreliable, like a website or product.
Again the go-to word; can also mean 'dubious' in terms of reliability or authenticity.
このサイトは怪しいから、クレジットカード情報を入力しないほうがいい。
This site looks shady, so you shouldn't enter your credit card info.
Literally 'cannot be trusted', a straightforward way to say something is unreliable or shady.
あの情報源は信用できない。
That source is shady (unreliable).
Describing a place sheltered from direct sunlight, like a garden or street.
The standard adjective meaning 'shady' in the literal sense of being in the shade.
日陰のベンチで休んだ。
I rested on a shady bench.
Specifically 'tree-shaded', often used for pleasant shady spots under trees.
木陰の道を散歩する。
Take a walk along a shady path.
Means 'not exposed to sunlight', can describe a shady area or a room that doesn't get sun.
この部屋は日が当たらないから、少し暗い。
This room is shady (doesn't get sun), so it's a bit dark.
Describing something that casts shade, like a tree or structure.
Literally 'to make shade', used for trees, buildings, etc.
大きな木が日陰を作っている。
A big tree is providing shade (is shady).
Meant for sunshades or awnings; 'shade-providing' in a functional sense.
日除けの傘をさす。
Put up a shady umbrella (parasol).
怪しい is the most general and neutral for 'suspicious'. 胡散臭い is more colloquial and implies a gut feeling of distrust. いかがわしい is more formal and often carries a nuance of indecency or immorality, used for businesses or products.
When you mean 'suspicious', never use 日陰の. It only means 'shaded from sunlight'. Use 怪しい or similar words for the figurative sense.
彼は怪しい人物だ。
He's a shady character.
木の下の日陰を見つけた。
I found a shady spot under the tree.
Also works for things that seem unreliable or fake.
そのアプリは胡散臭いからダウンロードしない。
I won't download that app because it looks shady.