The total number of blogs in Japan is about 16.9 million, the total number of articles is about 1.35 billion, the total amount of data is 42 terabytes

According to the Information and Communication Policy Research Institute (IICP) of the Ministry of Internal Affairs and Communications announced, the total number of blogs in Japan as of January 2008 was approximately 16.9 million, the total number of articles reached approximately 1.35 billion, the total amount of data reached 42 terabytes It is said that. Among them, the calculation with only text (characters) amounts to about 12 terabytes, and if we convert the amount of data per book as 457 kilobytes, it seems that it corresponds to about 27 million books how a book. It is a terrible huge library ... ... Japanese blog ... ....

Also, active blogs whose articles have been updated at least once a month are less than 20% of the total, about 3 million. Furthermore, the number of blogs newly opened every month has been moving around 400 thousand to 500 thousand monthly, and it seems clear that active dissemination of information continues.

Today, more detailed data on what is happening in Japanese blogs is from the following.
(PDF file)"Results of survey research on the actual condition of blogs"

According to the survey results, the total number of blogs (including those already deleted) opened since January 2001 is cumulatively about 22.4 million, the total number of articles is about 1.79 billion, the total amount of data is 54 terabytes It is said that.

Trends in the number of newly opened blogs every month. It is around 400,000 to 500,000 every month.


Trends in the total number of blogs in Japan. Similarly, the number of active blogs has increased sharply from 2004 to 2005, but it has remained almost flat at 3 million afterwards, and it turns out that there are many existing blogs that are newly updated but not updated anymore .


Trends in the number of articles per month. It is around 40 to 50 million monthly monthly.


Trends in the total number of open articles of domestic blogs.


Trend of total data volume of domestic blog.


Trend of monthly new article data volume. The data of about 1.6 terabytes is added every month.


Also pointed out is an increase in so-called "spam blogs" such as advertisement-induced blogs in which a large amount of various keywords are embedded in order to increase access from search engines, blogs created by copying contents of contents from other blogs It is being done.

According to it, when I surveyed about the active blog as of January 2008, in the number of blogs12% of the total is spam blogIt is said that the content of the spam blog is 38.3% for sales induction, 17.1% for affiliate income, and 7.0% for adult · dating site introduction.


Also, as a result of a somewhat interesting survey, it is mentioned as "the motivation for opening a blog" and it is in the order like this.

1st place: Self expression (30.9%)
Second place: formation of community (25.7%)
3rd place: Archive type usage (25.0%)
4th: Revenue objective (10.1%)
5th: Social contribution (8.4%)

Blog opening motivation It seems this is when you look at different trends by age.


The thematic trend by motive for blog opening is like this.