What visa should I get to go to Japan in the FASTEST WAY?

Question:

My father is Japanese and he's staying in Japan. Mom is Filipina. They are legally married in Philippines. I only have Philippine Citizenship and Philippine Passport but I need to go to Japan in the fastest way.

My dad is asking me if what are the preparations should he make.
What visa should i get?
What is this Certificate of Eligibility for?

Answer:

Your question is strange. Your "Japanese father" is in Japan, right?
Then why does he need to ask you about the procedure for the Certificate of Eligibility which is issued by the Japanese government? As long as he wants to sponsor your stay in Japan, all he has to do is to submit some documents to the Japanese government like this:
http://www.moj.go.jp/ONLINE/IMMIGRATION/…

The Japanese government will examine the documents in details in accordance with Japanese Immigration Law. If neither he nor you have legal problems, the Certificate of Eligibility will be issued. How long does it take? It's up to the legitimacy of the documents. However, when a false statement was found on the document, the certificate will be nullified even after your entry of Japan.