There are common courtesies and protocols that come into play in a typical lesson. Knowing and respecting Japanese culture will make your students feel more comfortable and you more confident.
Arriving early is etiquette.
Arriving early is polite and creates a good impression on Japanese people. If a person should arrive just in time it may be deemed late and inconsiderate to the person or parties waiting. This is especially important in a Japanese business environment.
Don't always take what Japanese say at face value.
If a person speaks in an honest and direct manner, Japanese people become very wary. It is not customary to demonstrate one's true feelings as it may risk offending someone. Japanese people are more concerned in protecting each other's feelings than expressing one's own feelings or attitudes. As a consequence, Japanese people resort to using simple responses such as "Yes or No" which can sometimes be a problem.
Don't always believe in Japanese smiles.
In Japan, smiles do not necessarily mean that the person is happy and or satisfied. Japanese prefer to mask their true emotions with a superficial smile to maintain a friendly atmosphere. If you really want to understand the Japanese psyche you have to observe closely.
Japanese culture does not include hugging or intimate physical contact in public. However, a handshake is fine.
It is a fundamental value to the Japanese culture to show respect to one another. Japanese people pride themselves on being mindful of one another’s feelings at all times. Being respectful in your interactions with Japanese people will gain you a valuable insight to the Japanese mentality and culture.