There are many problems in the grammar of telling the truth, such as improper use of words, unnatural sentence expression, lack of proper connection between sentences, and little actual expression in such a long volunteer letter, which shows that your ability to condense sentences is not very good.

In terms of content, the employer actually wants to know what your strengths are, what you can do, what problems you can solve for the company, and what value you can create for the company. As for how hard you work at school and how good your relationship with your teachers and classmates is, people don't need to know or want to know. The most fatal thing is that after reading this volunteer book, you don't even know what your major is in college.

I can't tell whether it was written by someone who studied in Japan for four years. It's not like a volunteer book, but more like an essay recalling the university. If Japanese companies see it, they will probably give up hiring you because of your application.

I found some reference materials for you. You can have a look at it sometime. They teach you how to write this job application:

Web page link

Here are some examples you can refer to:

Web page link

I hope I can help you.