What Is “Koso Koso”? The Japanese Sound of Sneaking, Whispering, and Moving in Secret

Ever heard someone whispering behind your back?

Or watched a cartoon character tiptoe across a hallway?

That’s when the Japanese mimetic word “Koso Koso” (こそこそ) sneaks in —
a whispery, subtle expression that captures the sound and feel of secretive, cautious movement or speech.

Let’s listen closely…

What is “Koso Koso” (こそこそ)?

“Koso Koso” is a mimetic word that expresses:

• Sneaky movement
• Secret conversations
• Suspicious or shy behavior

It’s often used to describe someone trying not to be noticed — whether they’re hiding something, sneaking around, or gossiping quietly.

Nuance:

Secretive or sneaky
Cautious or suspicious
Sometimes cute, sometimes shady

Pronunciation

ko-so ko-so
(Say it softly and with tension, like hushed footsteps in a quiet hallway.)

Categories

Movement / Atomosphere

What Does “Koso Koso” Look Like?

• Two characters whispering behind their hands
• Someone tiptoeing while glancing around
• A cat sneaking through the bushes
• A manga panel with “こそこそ…” in small letters

How Do You Say It?

Say it softly, like you don’t want to be overheard:
Koso koso…

Examples in Daily Life

Example: Secret snack mission

He snuck into the kitchen at midnight,
moving koso koso through the shadows…

Cultural Note

In English, we might say:

• “Sneak sneak”
• “Tiptoe”
• “Whisper whisper”

But “koso koso” blends sound, intent, and secretive behavior.
It can be shady or just shy — depending on context.

Watch & Feel the “Koso Koso” World!

Feel the “Koso Koso” — Secretly Eating!

Try Using It!

Next time you:

• Sneak a snack
• Whisper in class
• Watch a pet stalk quietly…

Say it in a hush:
Koso koso…

あわせて読みたい

What’s the Difference Between “Hiso Hiso” and “Koso Koso” in Japanese? Ever overheard a secret being whispered in a corner? Or noticed someone sneaking around trying not to be seen? In Japanese, these sounds and actions are capt…