The Japanese word for teacher is
先生

せんせい - sensei

teacher

Japanese Definition

先生
1. n. an elder
2. n. a scholar
3. n. a teacher or a professor
4. n. sensei (Japanese martial arts teacher)
5. n. sir, a polite form of address to teachers, doctors, etc.
6. n. Usage: * This is a term of respect, reserved only for speaking about others, and considered somewhat impolite (immodest) to use when referring to oneself. Instead, the term 教師 is conside
7. n. Usage: * (U:ja:infkata, センセー)
8. suffix. a title used after the name of teachers, doctors, lawyers, or certain other professionals
9. n. (dialect Hakata) teacher, professor