keitai mail

Tokyu ad agency found massive usage of Keitai (cell phone) mail among Junior High and High school students.
31% of them receive more than 41mails a day

19% of them receive 11 to 20 mails

18% of them receive 6 to 10 mails

15% receive 21 to 30

10% receive 1 to 5 mails

source: yomiuri shinbum