Mo-shi mo-shi (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 mo-shi mo-shi comes from
The phrase grew out of the humble verb mo-su (申す), an old, respectful way to say "to speak." Its stem, 申し, reads mo-shi — "I speak."
In the early days of the telephone, connections were faint and unreliable, and a caller would say it twice — mo-shi, mo-shi — 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 mo-shi was the fastest way to ask, in effect, "can you hear me?"
So there's nothing casual about its origins. Mo-shi mo-shi 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 mo-shi mo-shi: foxes — ki-tsu-ne (狐), Japan's shape-shifting tricksters — supposedly cannot pronounce it. Answer the phone with mo-shi mo-shi, 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. Ki-tsu-ne 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, mo-shi mo-shi 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 mo-shi mo-shi.
It has two more everyday uses worth knowing. On a bad connection, a rising "mo-shi mo-shi?" means "hello? are you still there?" And if a friend zones out mid-conversation, a playful "mo-shi mo-shi?" — often with a little wave — is the Japanese version of "earth to you."
Don't use mo-shi mo-shi to greet someone in person; it only works on the phone. To say hello face-to-face, reach for kon-ni-chi-wa (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 "mo-shi mo-shi" 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 mo-shi mo-shi.
Keep learning Japanese
Mo-shi mo-shi is a fun first word, but it lives entirely on the phone — for hello in person, you'll want kon-ni-chi-wa and its friends. Pick up the everyday greetings in our free Japanese greetings phrases, with audio and speaking practice in the Pretalk app.
