Use をはじめ to introduce one well-known or important example, and suggest that there are other similar cases. It is like saying 'starting with A, (there are also B, C, etc.)' in English. The noun before をはじめ is the most prominent item in a list, but you don't need to list everything. This pattern is common in both spoken and written Japanese, but you will hear it often in formal speeches, news, and essays. It can also be used in everyday conversation when you want to give a representative example from a group. After をはじめ, you often add など or といった to show that the list is not exhaustive. For example, '日本をはじめ、アジアの国々で...' means 'In countries starting with Japan, in Asia...'—Japan is the leading example, but others are included. When you use this pattern, you are not just saying 'for example'; you are implying that the first item is the most important or typical. Be careful not to use it for a random example; it should be a representative one. Also, the noun before をはじめ is marked with を, even if it would normally take が or に in the sentence. The rest of the sentence follows normally, and the noun phrase acts as a topic or subject.