Is there a specific format requirement for the employment certificate when applying for a Japanese visa?

There is no specific format requirement, but generally you need the following information: your unit, department/position, the company already knows that your holiday is from (date) to (destination), and the nature of your trip is to visit relatives/travel. ...

This is one of the model formats, What can be used for reference: here is my company _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ) is on vacation from _ _ (month/day) to _ _ (month/day), and all expenses (including airfare, accommodation, medical insurance, etc.) during his stay in your country shall be borne by himself. _ _ _ (applicant's name) will return to China on time after the trip and continue to serve our company.

Signature of leader:

Name of unit (official seal):

Unit phone number: