Why a New English Sound Might Feel Familiar (Even Though It Isn't)
Your brain tries to match unfamiliar English sounds to sounds you already know from Japanese — which is helpful and tricky at the same time.
When you hear an English sound that Japanese doesn't have, your brain doesn't leave it unlabeled — it quickly matches it to the closest Japanese sound it already knows. This is a well-documented pattern: listeners assimilate new sounds into existing categories rather than immediately creating new ones. It's efficient, but it also means two different English sounds can get squeezed into one Japanese 'slot' in your mind, making them hard to tell apart even after you've heard them many times. The fix isn't just more listening — it's noticing when you're doing this. Try this: pick two English words that feel like they might be the 'same' sound to you, say them slowly, and ask a native speaker or an app if they're actually different. Naming the confusion is the first step to untangling it. You're not making a mistake — you're just noticing your brain's very normal shortcut.
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Sources (1)
- Edinburgh Research Explorer
- Japanese adults frequently misidentify or fail to distinguish English consonants that lack direct counterparts in their native language.
- Perception is heavily influenced by the Perceptual Assimilation Model, where unknown sounds are categorized based on similarity to existing Japanese phonemes.
- Listeners tend to assimilate unfamiliar English sounds into the most similar native category rather than creating new distinct categories.