Who is the most popular Vocaloid?

  Japan has Valentine’s day on the 14th of February, where girls will give chocolates to the guys they like, or “friend chocolates” to others they have no romantic interest in. However, there is a holiday which accompanies it, where the guys reciprocate to girls that gave them something. What is this holiday called, and what day is it held?

How many Regions does Japan have?

What is the name of the man nicknamed "The Grandfather of Manga"?

What is the Japanese word for the tea ceremony?

Golden Week is the name for a week starting on April 29 every year in Japan, where several major holidays land in a row. It is a time of celebration, with festivals being held, and the longest paid leave for the average Japanese worker. How many holidays are held during this week long period?

Which anime has the most amount episodes?