Aizuchi: Japanese Conversational Interjections | Guidable - Your Guide to a Sustainable, Wellbeing-centred Life in Japan
two Japanese women using aizuchi in their conversation

Aizuchi: Japanese Conversational Interjections

By Guidable Writers Apr 22, 2021


When speaking to a Japanese friend, you may have noticed them nodding and making small interjections as you speak. They are referred to as aizuchi in Japanese. In linguistics, this is called “conversational interjection” or “back-channeling,” and while it’s an important part of Japanese culture, it may seem odd from a foreign perspective. For some people it may even be annoying — they may wonder, “Why does this person keep interrupting me?”

Let’s see how these interjections started in Japan and what back-channeling means for Japanese people.

The Origin of Aizuchi 

a hammer to show the origin of the word aizuchi

In Japanese the word for conversational interjection is aizuchi (相槌). Let’s break the word up and just look at the meaning of the individual kanji (chinese characters):


  • aspect, mutual, inter-, physiognomy, each other, minister of state, phase, councilor, together


  • hammer, mallet, sledge (hammer), gavel

In pre-modern Japan, two smiths would often work together to forge a sword. First, one smith would strike the molten metal with a hammer, then as that smith raised his hammer to strike again, the other smith would take a swing, allowing the smiths to forge the sword swiftly and efficiently. This rapid succession of alternating strikes is the origin of the term aizuchi (相槌), meaning something like “mutual-hammer.”

In the Edo Period (1603-1868), a master samurai and his apprentice would fight standing face-to-face, practicing sword-forms in an alternating series of strikes similar to the way sword-smiths forged their weapons. Eventually, the word came to mean a constant back-and-forth rhythm in conversation as well, and today aizuchi 相槌 is primarily used to refer to linguistic “conversational interjections.”

Here are a few examples of common aizuchi:

  • Sou desu ne / sou da ne / sou ne / sou da yo ne / da yo ne / sou nan da: I see; oh really.
  • sou desu ka / sou ka: Is that right? Is that so?
  • hontou? / hontou ni?: Really? Seriously? For real?
  • E! / ee! / a!: Exclamatory sound.
  • naruhodo: I see; I understand; Got it
  • tashika ni: Certainly; that’s right; if I’m not mistaken; if I remember correctly.
  • ii desu ne / ii ne: That’s good! Nice!

In Japanese conversational interjections are generally used to show that the listener is paying attention to the speaker, and the above are some of the most common phrases.

However, aizuchi can also vary according to the situation, and the term can also include longer, more conversational responses. Let’s take a more detailed look at this longer kind of aizuchi in few different contexts.

Major Purposes

1. Agreement

a piece of paper with the words "i agree" as an example of aizuchi

To show agreement, Japanese people often back-channel, nodding, and interjecting as the other person speaks. Usually, this is just a short response like the aizuchi listed above, but this kind of conversational interjection also includes longer responses.

For example:
(The interjections are shown in bold and may overlap with the other speaker’s lines):

B: Yesterday I stepped on a piece of broken glass in the street.
A: Seriously? Are you okay? Did you get hurt?
B: I tried to pick it up, and I cut my finger.
A: Oh…
B: I couldn’t leave the broken glass on the street, someone else could get hurt, you know?
A: YesI would do the same if I were you. Please take care of your finger.

2. Sympathy

two people facing each other as an example of sympathy for aizuchi

Interjecting can also be used to show that the speaker understands their partner and is on their side.


A: What’s wrong? You don’t look so good.
B: (Sigh) This is outrageous. Yesterday my boss yelled at me for something that wasn’t my fault, but I couldn’t argue with him.
A: I’m sure you just need to explain yourself more.
B: I don’t know how to get rid of this frustration.
A: It’s natural to get frustrated, don’t worry. This kind of thing happens to everyone!

3. Tell Me More!

boys eyes wide open in shock to show interest as an example of aizuchi

Aizuchi are also used as a signal to develop the current topic.

Example 1:

A: Hey, you look happy today. Any good news?
B: Guess what? I’m seeing someone!
A: Oh, Really?
B: Well, I met her at a hanami party last spring, and we’re going out for dinner tomorrow.
A: That’s wonderful! That is such good news, you look so happy, and I’m happy for you!

a woman with question marks around her asking about aizuchi

Example 2:

B: Hey, did you know that today’s math class is canceled?
A: Seriously? Why?
B: Do you remember how Mr. Lane was coughing terribly yesterday?
A: Yeah, I remember that.
B: Apparently he caught the flu, so he’s taking a few days off.
A: Ohhhh… So we don’t have math class tomorrow either?
B: Yes, that’s right.

two Japanese women using aizuchi in their conversation

Using Aizuchi, Is Important in Japanese Conversation

Now you know a few of the reasons Japanese people back-channel so often. To reiterate, aizuchi are short interjections used to show that the speaker:

  • Is listening carefully
  • Understands
  • Is sympathetic
  • Agrees
  • Wants to know more

You now know why many Japanese people use conversational interjections, and hopefully you’ve got a grasp on the way the meaning of aizuchi can change depending on the situation.

If you’re speaking with a Japanese person and you notice that they keep interjecting, try to take it as a positive! They’re just trying to show their interest and curiosity.


Learn about useful Japanese phrases for shopping in the article below:

Useful Japanese Phrases for Shopping in Japan