Moshi moshi (もしもし) means "hello?" — but only on the phone. It's how Japanese people answer casual calls, and saying it face-to-face is a small joke, a bit like greeting a friend in person with "operator?" On the phone, though, it's instant and universal.
It's one of the first Japanese words travelers recognize, and there's a surprising amount of history and folklore packed into those four syllables.
Where moshi moshi comes from
The phrase grew out of the humble verb mosu (申す), an old, respectful way to say "to speak." Its stem, 申し, reads moshi — "I speak."
In the early days of the telephone, connections were faint and unreliable, and a caller would say it twice — moshi, moshi — to show they were on the line and ready to talk. The doubled form stuck, and it became the standard way to open a call.
Japan's first telephone exchanges opened in the late 1800s, when calls went through a human operator and lines hissed and dropped. A quick, doubled moshi was the fastest way to ask, in effect, "can you hear me?"
So there's nothing casual about its origins. Moshi moshi began as a polite little announcement: I am about to speak to you.
The fox legend everyone loves
There's a beloved bit of folklore attached to moshi moshi: foxes — kitsune (狐), Japan's shape-shifting tricksters — supposedly cannot pronounce it. Answer the phone with moshi moshi, the story goes, and you prove you're a real human and not a fox in disguise. It's charming folklore rather than real etymology, but nearly everyone in Japan knows the tale.
The legend fits the culture perfectly. Kitsune fill Japanese myth as clever spirits who trick travelers by taking human form, so a password only a person can say makes a satisfying kind of sense.
How it's actually used
On a personal call, moshi moshi is the natural way in — friends and family answer with it constantly. Businesses skip it: a company answers with a crisp "hai," then its own name, never a casual moshi moshi.
It has two more everyday uses worth knowing. On a bad connection, a rising "moshi moshi?" means "hello? are you still there?" And if a friend zones out mid-conversation, a playful "moshi moshi?" — often with a little wave — is the Japanese version of "earth to you."
Don't use moshi moshi to greet someone in person; it only works on the phone. To say hello face-to-face, reach for konnichiwa (こんにちは) instead. Mixing them up is a classic beginner slip, and while it'll get a laugh rather than offense, it marks you instantly as new to the language.
Answering like a local
When your phone rings in Japan, a soft "moshi moshi" is all you need with people you know. Keep it light and quick — it's less a formal greeting than a friendly "you there?" If you're not sure who's calling, it's also the safe, neutral way to pick up.
For anything more formal — a business call, a stranger, a first impression — Japanese speakers lean on "hai" and their name, which reads as more professional than the cozy, familiar moshi moshi.
Keep learning Japanese
Moshi moshi is a fun first word, but it lives entirely on the phone — for hello in person, you'll want konnichiwa and its friends. Pick up the everyday greetings in our free Japanese greetings phrases, with audio and speaking practice in the Pretalk app.
