Changing the Topic in Casual Japanese: Saying "By the way" Naturally
Learn how to shift subjects smoothly in Japanese conversation with ところで, そういえば, ちなみに and 話は変わるけど, and see how each one links back to what was just said.
By PookieFriends & plans · Yapr Learn
In real conversation you rarely announce a brand-new topic out of nowhere. You connect it to what was just said: "Speaking of which...", "By the way...", "That reminds me...". Japanese does this with a small set of transition words placed at the very start of your sentence. The most common casual one is ところで (tokoro de), and the most useful for linking to the current topic is そういえば (sō ieba). This lesson shows you five reusable patterns, when each sounds natural, and how to keep the register consistent with the person you are talking to.
By the end, you can…
- shift to a new topic in casual Japanese using ところで, そういえば and ちなみに.
- choose between casual and polite topic-shift expressions depending on who I am talking to.
Listen once. Try it slowly. Then say it without looking.
Checking available voices…
ところで、最近どう？
By the way, how have you been lately?
to-ko-ro-de, sa-i-kin dō
The standard casual topic-shift. It signals a new subject that is not closely tied to the previous one. Safe with friends and close colleagues.
そういえば、田中さん結婚したんだって。
Speaking of which, I heard Tanaka-san got married.
sō i-e-ba, ta-na-ka-san ke-k-kon shi-ta-n da-t-te
Links the new topic to something just mentioned or just remembered. Use it when the previous line reminded you of something.
ちなみに、それはいくらだった？
By the way, how much was that?
chi-na-mi-ni, so-re wa i-ku-ra da-t-ta?
Adds a related side question. Slightly more neutral than ところで and common in both casual and semi-polite talk.
話は変わるけど、週末の予定は？
Changing the subject, what are your plans for the weekend?
ha-na-shi wa ka-wa-ru ke-do, shū-ma-tsu no yo-te-i
Explicitly announces a topic change. Useful when the new topic is clearly unrelated to the current one.
すみません、ちょっと伺いたいのですが。
Excuse me, I'd like to ask you something.
su-mi-ma-se-n, cho-t-to u-ka-ga-i-ta-i no de-su ga
Polite opener for asking staff a question. It shifts the interaction to a new purpose without sounding abrupt.
Pronunciation guides are approximate. Slow playback keeps the original pitch.
Make it make sense
Useful pattern
The basic shape is: transition word + plain statement or question. ところで marks a fresh topic: ところで、日本語の勉強はどう？ (By the way, how is your Japanese study?). そういえば marks a topic triggered by the previous line: A: 昨日、駅で会ったよ。 B: そういえば、あの駅、工事してたよね。 (Speaking of which, that station was under construction, right?). ちなみに adds a related aside: ちなみに、それ、どこで買ったの？ (By the way, where did you buy that?). All three sit at the start of the sentence and are followed by a comma pause in speech.
When to use it
Use ところで with friends, family and close coworkers. In polite conversation with a stranger or a customer, ところで can feel a little blunt on its own, so soften it: ところで、一つ伺ってもいいですか。 (By the way, may I ask you something?). そういえば works in both casual and polite settings because it explicitly connects to what was just said, which makes the shift feel natural rather than random. 話は変わるけど is casual and slightly more explicit; in polite speech say 話は変わりますが. Avoid stacking two transitions in one sentence, such as ところで、そういえば, which sounds indecisive.
Listen to each line, then take one part and reply out loud.
昨日、新しいカフェに行ったんだ。
Yesterday I went to a new cafe.ki-nō, a-ta-ra-shii ka-fe ni i-tta-n daそういえば、駅の近くにできたところ？
Speaking of which, the one that opened near the station?sō i-e-ba, e-ki no chi-ka-ku ni de-ki-ta to-ko-roうん、そこ。ところで、週末は何するの？
Yeah, that one. By the way, what are you doing this weekend?un, so-ko. to-ko-ro-de, shū-ma-tsu wa na-ni su-ru noちなみに、そのカフェ、混んでた？
By the way, was that cafe crowded?chi-na-mi-ni, so-no ka-fe, ko-n-de-taA little context goes a long way
Japanese conversation often prefers a soft link to the previous topic over an abrupt announcement. そういえば is especially valued because it shows you were listening and the new topic grew out of what the other person said. In service settings, staff may use 恐れ入りますが (osore irimasu ga) before a request; as a customer, すみません、ちょっと伺いたいのですが is a natural, polite way to open a question. Register matters more than the transition word itself: the same ところで can sound friendly with a peer and slightly abrupt with a superior.
One thing to watch for
Using ところで in a polite service encounter as a bare topic shift, for example saying ところで、メニューは？ to a server.
Try this instead: Soften it or use a polite opener: すみません、メニューをいただけますか。 or ところで、一つ伺ってもいいですか。 The transition word alone does not carry politeness; the sentence ending and the opener do.
Your turn
Try answering out loud before checking a possible answer.
1Your friend just mentioned they bought a new phone. You want to ask how much it cost, linking to that topic. Which transition fits best?
Show a sample answer
ちなみに、それはいくらだった？
ちなみに adds a related side question about something just mentioned. そういえば is also possible if the phone reminded you of something else, but ちなみに is the most natural for a follow-up detail question.
2You are talking to a coworker you do not know well and want to change to a new topic politely. What can you say?
Show a sample answer
話は変わりますが、少し伺ってもいいですか。
話は変わりますが is the polite version of 話は変わるけど, and 伺ってもいいですか softens the request. ところで alone is understandable but can sound blunt in this setting.
3Someone says 昨日、大阪に行ったよ。 You remember that a mutual friend lives there. Which transition shows you are linking to their line?
Show a sample answer
そういえば、山田さん、大阪に住んでるよね。
そういえば explicitly marks a topic triggered by what was just said, which fits here. ところで would also be grammatical but would sound like a less connected shift.
Start your topic shift with そういえば when it grows out of what was just said, ところで for a fresh subject among peers, and ちなみに for a related aside. In polite settings, soften the sentence ending or use 話は変わりますが.
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