Japanese Funeral Etiquette - A Helpful Guide for foreigners

I need a professional written text about the Japanese funeral etiquette. Imagine you are a business professional from Europe that has been invited by a Japanese business partner that is kind of a friend now to a funeral. So the invited foreigner needs to know something about the cultural specific characteristics and the do's and don'ts. About the length: I am interested to cover all the important stuff on 3 to 4 pages. If you just need two it is ok for me, also if you need 6 pages. My interest is a long term relationship and I need 50 plus topics to be covered.