Abstract
Twitter is one of the most popular micro blog services in the world. It has a large number of users and posts. One of the
reasons why so many people uses Twitter is that they can use it easily and can obtain many kinds of information in real
time. On Twitter, information is delivered via following networks. The following networks on Twitter are static and have
to be specified manually by each user, so a user cannot share information that he/she wants if that was out of his/her
following networks. On the other hand, it often happens that users want information about an event such as festival or
sport game when they are attending it. In this paper, we propose a method for composing ad-hoc following networks
automatically among users who are attending the same event for sharing information about it.
