Mail Club System
Emails are exchanged between members through a central server, ensuring email addresses remain private. Mail Clubs are used in various ways, the most common being for dating, friend searching, or to find sex partners. It is common that only the male has to pay to participate, with the cost of sending a mail ranging to up 400¥ per message.
- Telekura - Telephone Club. A forerunner to Mail Club, and still widely used.