後輩

• Reading: こうはい
• Romaji: kōhai
• Kanji breakdown: 後 (after/behind) + 輩 (companion/colleague) → one who came after; junior
• Pronunciation: /koː.ha.i/

Meaning

A junior student, underclassman, or someone less experienced in a shared context like school, work, or a club.

後輩 is the counterpart to 先輩 in Japan's hierarchical social system. As a 後輩, you're expected to use polite language, show deference, pour drinks first, and learn from those above you. While the dynamic can feel restrictive, being a 後輩 also means receiving guidance, mentorship, and protection from 先輩. The relationship evolves over time — today's 後輩 becomes tomorrow's 先輩.

Examples

1. 後輩が入ってきたから、しっかり先輩らしくしないと。 New juniors joined, so I need to step up and act like a proper senior.
2. 後輩に慕われる先輩になりたいな。 I want to be the kind of senior that juniors look up to.
3. 後輩の面倒見るのって大変だけど、自分も成長するよね。 Looking after your juniors is tough, but it helps you grow too.

Usage Guide

Context: school, work, clubs, daily life

Tone: affectionate, mentoring

Do Say

• 後輩にはちゃんと教えてあげるのが先輩の役目だよ。 (Teaching your juniors properly is a senior's responsibility.)
• かわいい後輩が入ってきたから部活が楽しくなった。 (A cute junior joined, so club activities got more fun.)

Don't Say

• 後輩に対して威張りすぎるとパワハラになる (Being too bossy toward juniors can cross into power harassment)

Common Mistakes

• Treating the 先輩/後輩 dynamic as purely negative — many Japanese people value the mentorship and bonds formed through this system

Origin & History

From 後 (after/behind) + 輩 (companion/group). Together with 先輩, it forms one of the core social relationship pairs in Japanese culture, rooted in Confucian values of respect for seniority.

Cultural Context

Era: Centuries-old concept, always current

Generation: All ages

Social background: Universal in Japanese society

Regional notes: Used across all of Japan. Less well-known internationally than 先輩 but equally important in Japanese social dynamics.