Shinikui Vs Shigatai: Understanding Their Subtle Differences

(Joy struggling to use chopsticks [~nikui] vs. Ken looking shocked at unbelievable news [~gatai])

“These chopsticks are hard to use.” (Tsukai-nikui)
“His excuse is hard to believe.” (Shinji-gatai)
In English, we just say “hard to [verb]” for everything. But in intermediate Japanese, you must divide your struggles! Is it a physical/practical problem? Or is it an emotional/psychological block? Mixing them up is a very common N3/N2 mistake. Let’s learn the rules with Joy and Ken!

🗣 Conversation Scene

Joy is talking to Ken about a very strange excuse a student made today.

Joy

ケンさん！今日、生徒が「犬が宿題（しゅくだい）を食べました」と言って遅刻（ちこく）しました。
とても信（しん）じにくいです！
(Ken! Today, a student was late and said, “My dog ate my homework.” It is very “Shinji-nikui” [hard to believe]!)

Ken

それはすごい言い訳（いいわけ）ですね…。
Joyさん、心（こころ）の中で「ありえない！」と思う時は、「信（しん）じがたい」を使うと自然（しぜん）ですよ！
(That is quite an excuse… Joy, when you think “That’s impossible!” in your mind, using “Shinji-gatai” sounds natural!)

💡 Explanation

Physical Limits vs. Emotional Blocks

1. 〜にくい (~nikui) = Physically or practically hard to do

Structure: Verb (Stem) + nikui
Used when an action requires a lot of physical effort, or when the tool/environment is bad. It can be used with almost any action verb.

この肉（にく）は硬（かた）くて食べにくい。
(This meat is tough and hard to eat. *Physical difficulty*)
漢字が小さくて読みにくい。
(The kanji is small and hard to read.)

2. 〜がたい (~gatai) = Psychologically/Emotionally hard to do

Structure: Verb (Stem) + gatai
Used when you can physically do it, but your mind, emotions, or morals make it nearly impossible. Because it relates to the mind, it is only used with a few specific verbs (believe, forgive, understand, say, imagine).

彼の話は信じがたい。
(His story is hard to believe. *Mental block*)
あの犯罪（はんざい）は許（ゆる）しがたい。
(That crime is unforgivable / hard to forgive. *Moral block*)
彼には事情（じじょう）を言いがたい。
(It is hard to tell him the situation. *Emotional block/hesitation*)

📊 Comparison Table

Suffix	Type of Difficulty	Common Combinations
〜にくい (~nikui)	Physical / Practical (It takes physical effort)	使いにくい (hard to use) 読みにくい (hard to read) 歩きにくい (hard to walk)
〜がたい (~gatai)	Psychological / Emotional (My heart/mind resists it)	信じがたい (hard to believe) 許しがたい (unforgivable) 理解しがたい (hard to understand)

🚧 The Steak Trap!

(Joy is eating a very tough piece of steak)

❌ Wrong: このお肉は 食べがたい です。
(Nuance: “I have a deep psychological or moral objection to eating this meat. It breaks my heart.” It sounds like you are eating a pet!)

✅ Right: このお肉は 食べにくい です。
(Nuance: “This meat requires too much physical jaw strength to chew.” Natural and correct.)

🔥 Practice Quiz

Tap to check the answer!

Q1. This pen slips in my hand. It is ______.
(Kono pen wa kaki-______ desu.)

Answer: nikui (書きにくい)
It is a physical difficulty caused by the tool.

Q2. That criminal did something terrible. It is ______.
(Sono hanzai wa yurushi-______.)

Answer: gatai (許しがたい)
It means unforgivable. It is a psychological/moral difficulty.

Q3. I lost my friend’s camera. It’s really ______ to tell him.
(Hontou ni ii-______ desu.)

Answer: nikui (言いにくい) OR gatai (言いがたい)
Both can work here! “Iinikui” is common for feeling awkward/hesitant. “Iigatai” sounds a bit more formal and deeply emotionally difficult.

Keep practicing with JPLT!