My work

I worked in a supermaket five years ago for niigatactiy and nagaokashi.My
company's name is harashin. I worked in food management.
I enjoyed eating many new foods. After making many sales, I left one month later.

I think I worked in a good job 
see you soon.

my work

I have worked at a supermaket for five years in niigatactiy on nagaokashi. The
company name is Harashin. I work in food management.
I enjoy my work. I eat many new foods for one week and one month after I leave I think I will make any sales floor.
I think I work at a good job. See you soon.

My work

I have worked in  a supermarket from five years ago from niigatactiy on nagaokashi. My company's name is Harashin. I work in food management, something I enjoy. I eat  many new foods for one week, one month after leaving and I think I will make any sales floor.

I work in a good job, I think.

See you soon.

Hello Yusuke,

I think I have corrected your words to what you mean. If you are still working for the company since 5 year ago we would use the present perfect - have/has + past participle. I am  not sure about the last part of that sentence with the Japanese words, it may be the names of places but I am not sure.

Best wishes

Bob