LINE
By simply reading out the QR codes or searching friends by phone number, e-mail address or ID, you can add your friends and chat with them

Twitter
You can share your tweets to others and also show others' tweets to people you don't know

Google+
It can be utilized in conjunction with Google service. It can make open but personal community online

Instagram
You can share the photos people with people all over world,and you can ask knowledge and answer questions to each other. And it can take a photo, edit and open

２channel
It is the bulletin board system where we can exchange our opinions. Because it is a sign-in-free, anyone can speak on it anonymously

Pinterest
the SNS that can gather pictures from web, and bookmark the ones you like

Yahoo!TIEBUKURO
It is knowledge retrieval service which Yahoo!JAPAN.manages. Some users can ask and answer questions to each other

Pixiv
You can send the pictures which you drew and the novels which you wrote and watch other's pictures and novels

Kik
A simple message tool. You can start using it without registration of your phone number

YouTube
SNS in which you can upload videos taken and edited by you and communicate with other users through them

Facebook
SNS that can connect to the real acquaintances using real names on the net

Hatena
Portable sites that have a lot of service、suck as human-powered search Hatena,Hatena bookmark and Hatena blog

Snapchat
It's not known very well in Japan. You can send pictures and messages with captions. They will be deleted in 10s after opening

Flickr
Community site for the purpose of the joint ownership of the photograph. You can even use it for safekeeping and backup purpose