A letter to NPO

To whom may it concern, (Editor's note: If this company is run by Americans, or Westerners then it is best to use the name of the person you are sending this email to. If you do not know their name, "Hello" would be good to use. Americans like familirarity.)

Hello,

--->My name is Nayuta Hori (Editor's note: If Hori is your first name then put Hori first). I am from Tokyo, Japan and I'm a second year university student. The reason why I decided to am sending this e-mail is just because I was fascinated by your activities, such as saving animals life.

--->A couple of months ago, I visited Thailand and other close located surrounding countries. What I saw in there was something that I did not expect. Things like, which are dogs without owners or wounded birds. At that time(Editor's note: We don't use その時 a lot in English) It made me feel powerlessness and I didn't know what to do. So when I came back to Japan, I searched and found for your web site.

--->I would love to experience the activities you have to offer. However, I am only available for about 2~3 weeks in August through September. Is there any chance I can participate? I'm also planning to take English language classes.

Yours sincerely, (Editor's note: This is not wrong, but it is more friendly and professional to say, "Thank you.")

A letter to a NPO (usually NPO denotes 'Non profit organisation' - is that what you meant)

To whom may it concern.

Dear Sir or Madam 

Dear Madam or Sir

Dear Publicity Officer

Dear Media Officer

http://www.letterwritingguide.com/howtoaddressaletter.htm

Hello, my name is Nayuta Hori from Tokyo, Japan and I'm a second year university student.
The reason why I decided to send this e-mail is just simply because I was fascinated by your activities, such as saving animals lives, for example.
A couple few months ago, I visited Thailand and other close located nearby countries. What I saw in their there was something that I did could not accept, and was totally unexpected?, not except which are things like ownerless dogs, and injured or wounded ('wounded' suggests deliberate, but 'injured' may be accidental) birds. At that time, I felt powerlessness and I didn't know what to do. So when I came back/returned to Japan, I searched and found your web site.
Is there any chances to experience participate in/assist in/volunteer for your activities for about 2~3 weeks in August through September. Also I'm planning to go English language school.

Yours sincerely