1. Language: The official language of Japan is Japanese, so you need to have a certain level of Japanese. If your Japanese level is not enough, you may need to study in a Japanese language school for a while.
2. Culture: Japanese culture is very different from other countries, including their etiquette, diet, festivals and so on. Understanding these cultures can help you better integrate into Japanese society.
3. Education system: Japan's education system may be different from your country, so you need to know their education system, including learning methods and curriculum.
4. Cost of living: The cost of living in Japan is relatively high. You need to know the cost of living in Japan, including accommodation, catering and transportation.
5. Visa and entry regulations: You need to know your visa type and entry regulations, including the documents you need to prepare and the visa application process.
6. Safety: Although Japan is a relatively safe country, you still need to know some basic safety knowledge, including how to avoid being the target of crime and how to ask for help in an emergency.
7. Medical care: In Japan, medical expenses are relatively high. You need to know about Japan's medical insurance system and the medical insurance you may need to buy.
8. Job opportunities: If you plan to work in Japan, you need to know the job market in Japan, including the demand of your major in Japan and the ways to find a job.
Generally speaking, studying in Japan requires full preparation, including understanding Japanese language, culture, education system, cost of living and other aspects of knowledge.