The name Great Teacher in Chinese / Japanese...

孔子 is how to write the name of the great sage, known in the West as Confucius.

His real name is Kongzi (The name Confucius is a westernized version of his name - his family name is Kong, and “zi” was added as a title of distinction).

He lived some 2500 years ago in Qufu, a town in modern-day Shandong Province of Northern China (about 6 hours south of Beijing by bus). He was a consort to Emperors, and after his death, the impact of his philosophies still served to advise emperors, officials, and common people for generations.

Also during these thousands of years, the Kong family remained powerful in China, and the Kong estate was much like the Vatican in Rome. The Kong estate existed as if on sovereign ground with its own small garrison of guards and the privileges of a kingdom within an empire.

This was true up until the time the Kong family had to flee to Taiwan in 1949 when the Red Army took victory over the Nationalists during the Revolution. The home of Confucius was later razed and all statues were defaced or stolen during the Cultural Revolution. Finally, after years of smearing his name and image, it is once again okay to celebrate the teachings of Confucius in mainland China.

Known as Khổng Tử in Vietnamese.

大師 is a way to title a great master, grand master, or great teacher.

This can be used in the context of martial arts or a Buddhist teacher. Thus, it can be used to title a living Buddha, Bodhisattva, or high-ranking monk.

聖 is the simple, single-character religious form of “saint” in Chinese (also holds the same meaning in Japanese and Korean, though rarely used alone like this).

This can also mean holy, sage, master, or priest.
Note: 聖 is often used in compound words (words of more than one character) to create further meanings. In compounds, it can mean holy, sacred, or divine.

聖 is also used as the first word for Spanish and English place names such as “San Diego” and “St. Louis” in Chinese (not Japanese).

In the Buddhist context, this can represent ārya or sādhu. And mean a sage; wise and good; upright, or correct in all his character; sacred, holy, or saintly.

聖者 is the religious way to express the idea of “Saint” in Chinese, Korean Hanja, and Japanese Kanji.

Some may translate this as “Holy man” or “Holy person.”

聖人 can mean saint, sage, or holy man.

Note: There is more than one way to express this idea. This one really matches “Holy man” because the second character means “human” or “person” (therefore, this could equally mean “Holy woman”).

老師 directly translates as “old teacher,” “old master,” or “old sage.”

Together, they are understood as “teacher.” When you think about that, also realize that with age comes respect in Asian cultures. So calling someone old is a term of respect (not like the way we mean it in English). You could replace “old” with “respected” and be closer to how this is meant in Chinese.

Teachers, in general, are more respected by their students and the population in China. When I was a teacher in China, I certainly felt that.

This term is also used for masters of certain fields. For instance, a master calligrapher would respectfully be addressed as a “teacher.” In this case, “master” and “teacher” are synonymous.

Other artists (especially those who are famous or accomplished) should be addressed with this term. Also, some martial arts schools use this term of respect for their masters/teachers/instructors.

This title is recognized in Japanese as "roushi" with the same meaning but it’s rarely used in Japan.

哲 is a Japanese name that is often romanized as Tetsu.

The meaning of the character can be: philosophy; wise; sage; wise man; philosopher; disciple; sagacity; wisdom; intelligence.

哲 can also be romanized as: Yutaka; Masaru; Hiroshi; Tooru; Tetsuji; Choru; Satoru; Satoshi; Akira; Aki.