How to get a koseki tohon of my father?

How will i be able to get a copy of koseki tohon of my father if i'm not in Japan. I want to locate him so i am hoping that he update his koseki tohon.

I would take whatever you have - addresses, your birth certificate, letters with addresses, etc. - to a Japanese Embassy, and ask them to help. Depending upon how they assess your situation, they will be best suited to advise you.

How can I possibly send you an email to give you my full details regarding this matter?

Even if you gave all your details to someone in Japan, it is not that anyone can go to city hall on your behalf. You can apply for official duplicate of your father's koseki because you are his child, but for anyone else to ask, you need to write out a proper power of attorney to authorize that person to ask for a copy. It is best if you tried at the embassy/consulate first. Best wishes.

unfortunately, embassy will not help you.
you have to contact by written mail to the city office where your father's koseki is there.
a problem is how to pay the necessary handling and postal fees.