The first thing English speakers usually do with Japanese name suffixes is turn them into a table. -san means Mr. or Ms. -sama is extra polite. -chan is for children. It is a tidy little chart, and like most tidy little charts, it gets you only part of the way there.
Japanese name suffixes are not really titles. They are a way of marking distance: how close you are to someone, whether they sit above or below you in the local hierarchy, and what kind of situation you are both standing in. They do some of the same social work that keigo does at the sentence level, but they do it in the smallest possible space: at the end of a name.
Table of Contents
- Why "Mr." is a bad translation
- The four you actually need
- The workplace tier: senpai, sensei, -shi
- The signal you might miss: yobisute
- What this means in practice
Why “Mr.” is a bad translation
“Mr.” in English is fairly blunt. You use it in certain formal settings, and you skip it in others. Even then, it is fading from everyday speech. A Japanese name suffix is doing more work than that. It can point to several things at once:
- How well do I know this person? (intimacy axis)
- Are they above, below, or beside me in the local hierarchy? (vertical axis)
- What context is this conversation happening in? (work, school, family, neighborhood)
- Who else is listening? (a colleague behaves differently in front of a client)
That is a lot to pack into one or two syllables, but Japanese listeners read it quickly. A wrong suffix may not cause a dramatic scene. More often, the room just gets a little cooler.
The four you actually need
-san (さん) — the safe default
If you remember one name suffix, remember this one. -san works for adults you do not know intimately, regardless of gender or age. It acknowledges the person without claiming closeness. Use it for coworkers, neighbors, the person at the front desk, and anyone you have just been introduced to. You will rarely be wrong.
The trap is simple: never use -san on yourself. Saying “Tanaka-san desu” when introducing yourself is a small but conspicuous mistake. You have politely honored your own name.
-sama (様) — the customer-facing register
-sama is what -san becomes when a service relationship is involved. A shop clerk addresses you as okyaku-sama (honored customer). A bank may address an envelope to Tanaka-sama. It is not just “extra polite -san.” It marks a specific kind of asymmetry, where the speaker is placing the other person in the honored position.
Using -sama between equals can sound sarcastic or strangely formal, like calling a friend “sir.” Save it for letters, customer-service contexts, and the occasional deity (kami-sama).
-kun (君) — the smaller, the younger, the inside
-kun is where the simple politeness model falls apart. It is used for boys, for younger male colleagues, sometimes for younger female employees by a senior, and sometimes between male friends. The common thread is not exactly gender or age. It is relative position. A boss can call a subordinate -kun even if that subordinate is middle-aged, married, and senior in every other part of his life.
For non-native speakers, the safest read is this: -kun usually means the speaker is treating the other person as inside the group, and below or beside them. Do not pick it up casually.
-chan (ちゃん) — affection, smallness, intimacy
-chan softens a name. It is used for children, family members, close friends, pets, mascots, and sometimes adult women in informal friendships. Outside those contexts, an adult man calling an adult woman -chan in the workplace is a red flag. It claims a closeness he may not actually have.
One useful clue: -chan is the suffix that can attach itself to mascots and cute versions of things. That tells you a lot about its register. It is about affection and smallness, not respect.
The workplace tier: senpai, sensei, -shi
Once you step into a workplace, school, club, or any organized group, a few more terms start doing real work.
Senpai (先輩) means “the one ahead.” It is used for someone who joined the school, club, or company before you did, regardless of their formal rank. The paired word is kohai (後輩), the one who came after, but you almost never call someone kohai to their face. The asymmetry is the point: the senior can use the junior’s name; the junior often recognizes the senior by title.
Sensei (先生) literally means “born before,” but in practice it covers teachers, doctors, lawyers, politicians, and certain artists. It is broader than the English word “teacher.” It marks a person whose expertise has been publicly recognized.
-shi (氏) appears mostly in writing: news articles, formal documents, academic citations. It is cool and impersonal. You will rarely need to say it out loud.
The signal you might miss: yobisute
Textbooks tend to focus on which name suffix to use. In real life, one of the bigger signals is the moment the suffix disappears. This is called yobisute (呼び捨て), literally “throwing away the call.”
When two people who have been calling each other Tanaka-san and Sato-san for years suddenly become just Tanaka and Sato, something has changed. They have moved into a closer circle: close friends, lovers, family-equivalents. It often happens by mutual agreement, sometimes with one person asking, “Can I just call you Tanaka?” It is not a casual move.
The reverse is also meaningful. If a colleague who used to call you by your given name suddenly starts calling you Lastname-san, something has gone wrong. The suffix has been put back in place.
What this means in practice
If you are a foreigner in Japan, people who know you may call you Firstname-san, while service staff will often treat you as okyaku-sama. This is not because the rules are completely different for foreigners. It is because the system has placed you in a polite outsider position. That is fine. It is hospitable, and it keeps everyone from having to solve the whole relationship at once.
The most useful thing you can do is listen. Pay attention to which suffix your Japanese coworkers use for the boss, for each other, and for the person who joined six months after them. Each choice tells you a little about the social map of that office.
And if you feel uncertain, default to -san. It says, in the least dramatic way possible: I see you, I respect you, and I am not assuming more closeness than I have earned.