Aisatsu(挨拶)or Greetings. Make sure to properly greet your office when you get to the office and when you're leaving. Here are a list of greetings:
Be on time. Be at least 5 minutes early to work, class, or meetings.
Dress to impress. Unless it's Sport's Day or school cleaning day, dress professionally. No sweatpants or jeans. No revealing clothing. You don't have to wear a suit everyday, but during special occasions such as Opening Ceremony, Graduation, and Closing Ceremony, you should be wearing a proper suit. For every day attire, look at your coworkers. Some people will be wearing tracksuits, but you should be aiming for the middle upper end of the pack in terms of dressing. If you have a support teacher at your school, try looking to them for how someone in your position should be dressing. Basing it off of your JTE isn't a bad idea, either. Click here for a more in-depth explanation of what to wear.
The art of gift-giving (omiyage). Omiyage is an obligatory gift when someone returns from a trip. Follow these tips when before purchasing omiyage: