If senpai means a senior member, what do Japanese people call the person who joined later?
The answer is 後輩 (kōhai / kouhai).
Depending on the context, it may be translated as:
・junior
・underclassman
・junior colleague
・younger or less experienced member
・someone who came after you in the same field
Today’s Japanese word is 後輩 (kōhai)!
It combines 後 (kō: after / behind) and 輩 (hai: fellow / member / order).
Its core image is “a fellow member who came after you.”
What Does Kouhai Mean in Japanese?
後輩 refers to someone who is junior to you in a shared school, workplace, club, organization, profession, art, or field.
Hiragana: こうはい
Romaji: kōhai / kouhai
Pronunciation: kō-hai
Basic meaning: junior member / underclassman / less experienced colleague
彼は大学の後輩です。
Kare wa daigaku no kōhai desu.
He is my junior from university.
新しく入った後輩に仕事を教えています。
Atarashiku haitta kōhai ni shigoto o oshiete imasu.
I am teaching the job to a junior colleague who recently joined.
The Core Image of Kouhai: “A Fellow Member Who Came After You”
The meaning becomes clearer when the word is divided into its two kanji.
after / later / behind
輩 (hai)
fellow / companion / member of a group / order or sequence
後 + 輩
⇒ a fellow member who comes after you
⇒ someone behind you in joining order, experience, study, or training
The opposite word is 先輩 (senpai), meaning a senior member or someone who came before you.
先 = before ⇒ 先輩 = member who came before
後 = after ⇒ 後輩 = member who came after
Kohai or Kouhai: Which Spelling Is Correct?
The Japanese word is written こうはい. The first vowel is long: こう (kō).
Accurate romanization using a macron
kouhai
Accurate keyboard-friendly spelling showing こう as “kou”
kohai
Common simplified English spelling, but it does not show the long vowel
For an English-language article, it is useful to include all three spellings for search purposes. In learner explanations, kōhai or kouhai represents the Japanese reading more clearly.
Senpai vs Kouhai: What Is the Difference?
| Japanese | Romaji | Position in the relationship | Common English |
|---|---|---|---|
| 先輩 | senpai | Came earlier or has more experience in the shared group | senior / upperclassman / senior colleague |
| 後輩 | kōhai | Came later or has less experience in the shared group | junior / underclassman / junior colleague |
田中さんは私の先輩です。
Tanaka-san wa watashi no senpai desu.
Tanaka is my senior.
私は田中さんの後輩です。
Watashi wa Tanaka-san no kōhai desu.
I am Tanaka’s junior.
How the Senpai–Kouhai Relationship Works
The senpai–kōhai relationship is a relative senior–junior relationship found in schools, clubs, sports teams, workplaces, organizations, and professional fields in Japan.
The basic idea is:
has earlier experience in the group
↓
shares knowledge, explains customs, offers advice, and may support newer members
Kōhai
joined later or has less experience
↓
learns from senior members, observes group customs, and gradually gains experience
This is not necessarily a formal job rank or a written rule. The strength of the relationship depends heavily on the organization.
What Is a Senpai Expected to Do?
There is no universal rulebook, but a senpai may be expected to:
・explain unwritten rules and group customs
・answer questions from newer members
・give advice based on experience
・introduce the kōhai to other members
・model appropriate behavior
・take some responsibility for helping juniors develop
・support the kōhai when problems arise
先輩として、後輩の相談に乗るようにしています。
Senpai to shite, kōhai no sōdan ni noru yō ni shite imasu.
As a senior, I try to listen to my juniors and give them advice.
仕事の流れを後輩に説明しました。
Shigoto no nagare o kōhai ni setsumei shimashita.
I explained the workflow to a junior colleague.
What Is a Kouhai Expected to Do?
A kōhai may be expected to:
・ask questions and accept reasonable guidance
・use appropriate politeness for the situation
・observe group rules and customs
・complete their share of the work
・support other members rather than only receiving help
・eventually guide newer members when they become a senpai
分からないことを先輩に質問しました。
Wakaranai koto o senpai ni shitsumon shimashita.
I asked my senior about something I did not understand.
来年は私にも後輩ができます。
Rainen wa watashi ni mo kōhai ga dekimasu.
Next year, I will have junior members too.
The Senpai–Kouhai Relationship at School
At school, grade level often determines the relationship.
Second- and third-year students are senpai.
Second-year student
Third-year students are senpai.
First-year students are kōhai.
Third-year student
First- and second-year students are kōhai.
彼女は高校の二年後輩です。
Kanojo wa kōkō no ni-nen kōhai desu.
She was two years below me in high school.
後輩たちが卒業式で花をくれました。
Kōhai-tachi ga sotsugyō-shiki de hana o kuremashita.
The younger students gave me flowers at the graduation ceremony.
Students in the same year are usually 同級生 (dōkyūsei), meaning classmates or students in the same grade, rather than senpai and kōhai.
The Senpai–Kouhai Relationship in School Clubs
The relationship is often especially visible in school sports and extracurricular clubs.
A senior member may teach techniques, explain routines, organize practice, or help new members adapt. A junior member may learn procedures and use more polite speech with seniors.
・practical mentoring
・skill transfer
・emotional support
・strong group identity
・leadership experience
Possible negative sides:
・excessive hierarchy
・pressure to obey
・unfair chores
・exclusion or hazing
・bullying disguised as “tradition”
Research on Japanese middle- and high-school clubs has found that the perceived strength of the relationship varies by grade, club type, competitive level, and the culture of the individual club. It should therefore not be treated as one identical system across all Japanese schools.
The Senpai–Kouhai Relationship at Work
At work, joining date, experience, department history, or time in a particular role can create a senpai–kōhai relationship.
鈴木さんは年下ですが、会社では私の先輩です。
Suzuki-san wa toshishita desu ga, kaisha de wa watashi no senpai desu.
Suzuki is younger than I am, but is my senior at the company.
私は年上ですが、入社が遅いので彼の後輩です。
Watashi wa toshiue desu ga, nyūsha ga osoi node kare no kōhai desu.
I am older, but because I joined the company later, I am his junior.
A senpai may have no formal authority over the kōhai.
上司 (jōshi) = boss / workplace superior
部下 (buka) = subordinate
先輩 (senpai) = senior member
後輩 (kōhai) = junior member
A person can be your senpai but not your boss. A manager can also be your boss without being your senpai in the original joining-order sense.
Kouhai vs Subordinate: What Is the Difference?
| Japanese | Meaning | Formal authority? | Typical basis |
|---|---|---|---|
| 後輩 | Junior member | Not necessarily | Joined later or has less experience |
| 部下 | Subordinate | Yes, within the organization | Reporting line or formal position |
| 新人 | Newcomer / new employee | No | Recently joined |
| 年下 | Younger person | No | Age |
彼は私の後輩ですが、部下ではありません。
Kare wa watashi no kōhai desu ga, buka de wa arimasen.
He is my junior colleague, but he is not my subordinate.
Can a Kouhai Be Older Than the Senpai?
Yes. The relationship is not determined by age alone.
Emma joins a company at age 35.
Haruto joined the same department three years earlier and is 28.
Haruto can be Emma’s senpai at work.
Emma can be Haruto’s kōhai at work.
Outside the workplace, Emma is still the older person. The relationship changes with the context.
Can One Person Be Both Senpai and Kouhai?
Yes. The terms are always relative to another person.
・senpai to first- and second-year students
・kōhai to graduates who were earlier members of the same club
A second-year employee is:
・senpai to this year’s new employees
・kōhai to employees who joined before them
私も先輩になりましたが、山田さんの前ではまだ後輩です。
Watashi mo senpai ni narimashita ga, Yamada-san no mae de wa mada kōhai desu.
I have become a senior too, but I am still a junior in relation to Yamada.
Do Kouhai Use Keigo with Senpai?
A kōhai often uses polite language with a senpai, especially when the relationship is new, formal, or clearly hierarchical.
先輩、これを見ていただけますか？
Senpai, kore o mite itadakemasu ka?
Senpai, could you please look at this?
Casual after becoming close:
先輩、これ見てくれる？
Senpai, kore mite kureru?
Senpai, can you look at this?
Not every kōhai speaks formal keigo to every senpai. Friends, teammates, and close coworkers may use casual speech, especially when the age difference is small and the group is informal.
The senpai may speak more casually to the kōhai, but this is also a tendency rather than an absolute rule.
Do You Call Someone “Kouhai” Directly?
Kōhai is usually more natural as a description of the relationship than as a direct title.
彼は私の後輩です。
He is my junior.
Natural direct address:
佐藤さん / 佐藤くん / 美咲ちゃん
Sato-san / Sato-kun / Misaki-chan
Less typical direct address:
「後輩！」
“Hey, junior!”
Calling someone simply kōhai may sound comic, dramatic, impersonal, or intentionally anime-like unless the group has made it a nickname.
What Does Kouhai Mean in Anime?
In anime and manga, kōhai has the same basic meaning as in real Japanese: a junior student, junior club member, junior coworker, or less experienced person in the same group.
・a first-year student learning from an upperclassman
・a new sports-club member admiring a skilled senior
・a junior employee receiving help from an experienced coworker
・a younger fighter or apprentice following a veteran
・a romantic interest who happens to be junior
かわいい後輩ができた。
Kawaii kōhai ga dekita.
I have a cute new junior member.
後輩の面倒を見るのも先輩の役目だ。
Kōhai no mendō o miru no mo senpai no yakume da.
Looking after junior members is also a senior’s responsibility.
先輩に追いつけるように頑張ります。
Senpai ni oitsukeru yō ni ganbarimasu.
I will work hard so that I can catch up with my senior.
Is Kouhai Japanese Slang?
No. Kōhai is a standard Japanese word, not slang.
English-speaking anime communities may use it playfully for a younger fan, junior teammate, newcomer, or less experienced person. That online usage may be broader than normal Japanese.
a junior member in a shared school, company, club, organization, or field
Playful English or fandom use:
a newcomer, younger fan, less experienced friend, or junior character
Is the Senpai–Kouhai Relationship Always Strict?
No. The relationship can range from strict and formal to friendly and almost equal.
clear language rules, strong hierarchy, assigned duties, formal behavior
Moderate group:
polite speech at first, practical mentoring, gradually increasing familiarity
Casual group:
little emphasis on seniority, first-name basis, friendly peer-like interaction
Studies of club activities have described multiple aspects of these relationships, including fellowship, leadership and followership, partnership, and in some environments dominance and submission. This means the expression senpai–kōhai relationship does not automatically describe either a good mentoring system or a bad oppressive system; the actual behavior matters.
When the Senpai–Kouhai Relationship Becomes Unhealthy
Seniority can be useful for mentoring, but it should not be used to excuse abuse.
・teaching necessary skills
・giving specific and respectful feedback
・sharing experience
・helping the junior become independent
Unhealthy behavior:
・insults or humiliation
・violence or threats
・unreasonable personal errands
・forced drinking or social participation
・exclusion and bullying
・using “tradition” to silence objections
In workplaces, harassment can arise from an advantageous relationship based not only on official rank but also on seniority, experience, expertise, or interpersonal influence. Being a senpai does not make harmful behavior acceptable.
Is the Senpai–Kouhai System Changing?
There is no single nationwide system, and practices continue to vary.
Many contemporary schools and workplaces try to reduce unnecessary hierarchy, use -san regardless of rank or gender, encourage open communication, and frame senior members as supporters rather than unquestionable authorities.
At the same time, the words senpai and kōhai remain useful for describing real differences in joining order and experience.
the junior follows and obeys the senior
Healthier modern image:
the senior shares experience
the junior learns and contributes
both communicate respectfully
the junior eventually becomes a senior to others
Natural Example Sentences with Kouhai
彼は中学校の後輩です。
Kare wa chūgakkō no kōhai desu.
He is a junior from my middle school.
会社の後輩と昼ご飯を食べました。
Kaisha no kōhai to hiru-gohan o tabemashita.
I had lunch with a junior colleague from work.
後輩にパソコンの使い方を教えました。
Kōhai ni pasokon no tsukaikata o oshiemashita.
I taught a junior member how to use the computer.
彼女は三年後輩ですが、とても頼りになります。
Kanojo wa san-nen kōhai desu ga, totemo tayori ni narimasu.
She is three years my junior, but she is very dependable.
後輩だからといって、雑用を全部任せるのはよくない。
Kōhai da kara to itte, zatsuyō o zenbu makaseru no wa yokunai.
It is not right to give someone all the menial work just because they are junior.
先輩と後輩ですが、今では親しい友達です。
Senpai to kōhai desu ga, ima de wa shitashii tomodachi desu.
We are senior and junior, but now we are close friends.
優しい先輩に恵まれて、安心して仕事を覚えられました。
Yasashii senpai ni megumarete, anshin shite shigoto o oboeraremashita.
I was fortunate to have a kind senior, so I could learn the job with confidence.
私の後輩が、今度は新人の指導を担当します。
Watashi no kōhai ga, kondo wa shinjin no shidō o tantō shimasu.
My junior will now be responsible for training the new employee.
Useful Expressions with Kouhai
a junior from school
大学の後輩
a junior from university
会社の後輩
a junior colleague
部活の後輩
a junior club member
一年後輩
one year junior
かわいい後輩
a dear / likable junior member
後輩を指導する
to train or guide a junior
後輩の面倒を見る
to look after a junior
後輩に慕われる
to be liked and respected by one’s juniors
Senpai, Kouhai, Dōryō, Dōkyūsei, and Buka
| Japanese | Reading | Meaning | Main relationship |
|---|---|---|---|
| 先輩 | senpai | senior member | Came earlier / more experienced |
| 後輩 | kōhai | junior member | Came later / less experienced |
| 同僚 | dōryō | coworker / colleague | Works in the same organization |
| 同級生 | dōkyūsei | classmate / same-year student | Same grade or graduating class |
| 部下 | buka | subordinate | Formal reporting relationship |
| 新人 | shinjin | newcomer / new employee | Recently joined |
Common Mistakes with Kouhai
Mistake 1: Thinking Kouhai Means “Younger Person”
○ kōhai = a junior within a shared group, organization, or field
Mistake 2: Thinking Kouhai Means “Subordinate”
A kōhai may have the same official job level as the senpai. The relationship is based on seniority or experience, not necessarily managerial authority.
Mistake 3: Calling a Person “Kouhai” as a Normal Title
Use the person’s name with an appropriate suffix. Kōhai usually describes the relationship.
Mistake 4: Assuming All Japanese Groups Are Strictly Hierarchical
The strength and rules of the relationship differ greatly among schools, clubs, workplaces, generations, and individuals.
Mistake 5: Treating Abuse as Japanese Culture
Guidance and mentoring are different from harassment. Seniority does not justify harmful behavior.
FAQ About Kouhai and the Senpai–Kouhai Relationship
What does kouhai mean?
Kōhai means a junior member or someone who joined the same school, workplace, club, organization, or field after you.
What is the difference between senpai and kouhai?
A senpai came earlier or has more experience in the shared group. A kōhai came later or has less experience.
Is kouhai younger than senpai?
Not necessarily. The kōhai can be older in age if they joined the group or field later.
Can a person be both senpai and kouhai?
Yes. A person can be a senpai to newer members and a kōhai to members who came before them.
Does kouhai mean subordinate?
No. A subordinate has a formal reporting relationship. A kōhai is simply junior in joining order or experience and may hold the same job rank.
Do you call someone kouhai directly?
Usually not. Japanese speakers normally address a junior by name plus -san, -kun, or -chan. Kōhai is mainly used to describe the relationship.
Is kouhai slang?
No. It is a standard Japanese word used in schools, workplaces, clubs, organizations, and professional fields.
What does kouhai mean in anime?
It means a junior student, club member, coworker, apprentice, or less experienced member. It does not inherently mean a younger romantic interest.
Does a kouhai have to obey a senpai?
No. A kōhai may respect and learn from a senior, but seniority does not justify unreasonable commands, bullying, violence, or harassment.
Does a kouhai use keigo with a senpai?
Often, especially in a new or formal relationship. Close friends and members of casual groups may use less formal speech.
What is a senpai supposed to do for a kouhai?
A senpai commonly shares experience, explains group customs, offers advice, teaches skills, and helps the kōhai become independent.
What is the correct spelling: kohai or kouhai?
Kōhai accurately marks the long vowel. Kouhai shows the Japanese spelling こうはい without special characters. Kohai is a common simplified spelling.
Are senpai and kouhai friends?
They can be. The terms describe seniority, not emotional closeness. Their relationship may be formal, friendly, distant, tense, or romantic depending on the individuals.
Summary: The Meaning of Kouhai and the Senpai–Kouhai Relationship
Kōhai means a junior member, underclassman, junior colleague, or person who came after you in a shared field.
● Kanji
後 = after / behind
輩 = fellow / member / order
⇒ “a fellow member who came after you”
● Opposite
先輩 (senpai) = senior member who came before
● Not determined only by age
An older newcomer can be the kōhai of a younger experienced member.
● Not the same as subordinate
Kōhai describes seniority or experience, not necessarily formal authority.
● Healthy relationship
The senpai shares knowledge and support.
The kōhai learns, contributes, and eventually guides newer members.
● Important limit
Seniority does not justify bullying, unreasonable orders, or harassment.
Remember the direction:
先輩 = the fellow member who came before
後輩 = the fellow member who came after
The best senpai–kōhai relationship is not based on blind obedience. It is a cycle in which experienced members help newer members grow—and those newer members later support the next generation.
References
- Kotobank: 後輩 — definitions including a later-born or later-joining person and a junior member of the same school or workplace.
- Kotobank: 先輩 — definitions of seniority based on learning, experience, status, school, and joining order.
- Kotobank: 輩 — meanings including fellow, member, and order.
- Japanese Journal of Educational Psychology: 部活動における先輩後輩関係の研究 — research on how senpai–kōhai relationships vary among middle- and high-school clubs.
- Japan Journal of Physical Education, Health and Sport Sciences: 女子大学生スポーツ競技者の先輩後輩関係 — discussion of fellowship, leadership/followership, partnership, and dominance/submission dimensions.
- Ministry of Health, Labour and Welfare: What Is Workplace Power Harassment? — guidance on harmful conduct arising from advantageous workplace relationships.