A recent survey from goo Research, reported on by japan.internet.com, into text-based communication revealed carrier email ruled for mobile users, but SMS was also unexpectedly popular.
Between the 7th and 10th of May 2013 1,073 members of the goo Research online monitor group completed a mobile phone (including smartphone) based survey. 54.1% of the sample were female, 2.1% in their teens, 18.6% in their twenties, 38.3% in their thirties, 27.8% in their forties, and 13.1% aged fifty or older.
Quite frankly, I find the mobile carrier SMS figure very difficult to believe, especially as there is no such thing as free texts plans, and they cost 3.5 yen each on docomo at least, and all phones come with carrier email that is usually free and supports much longer messages than SMS. Perhaps many people think that sending an email to another mobile user is SMS? However, talking to a friend, he suggested that emoji on the iPhone are much easier to use in SMS than in email, and also LINE (pictured above) encourages people to use phone numbers, not email addresses.
I use pretty much everything listed here, except for SMS and SNS. I use Google Hangouts for social chat, which I suppose counts as a voice call service, especially now it has become a standalone app rather than the old Messenger that was grafted on to Google Plus.