Final answer:
The Comic Market, or Comiket, is a self-published comic book fair held twice a year in Tokyo. About 35,000 circles gather at each event to distribute doujinshi.
Step-by-step explanation:
The Comic Market, also known as Comiket, is an event held twice a year in Tokyo, Japan. It is the world's largest self-published comic book fair where creators, known as circles, gather to sell and distribute doujinshi. Doujinshi are self-published works that are often fan-made and cover a wide range of genres. The number of circles participating in Comiket varies each year, but on average, around 35,000 circles gather at each event.