The Japanese are more likely to include emoji in their writing, as they are the inventors of the communication style. You might send a kadomatsu emoji to a clie

The Japanese are more likely to include emoji in their writing, as they are the inventors of the communication style. You might send a kadomatsu emoji to a client and that could be completely acceptable, depending on the nature of the relationship. The Japanese, of course, would have additional formalities beyond a kadomatsu including year end cards, spring gifts, etc.