For many fan, if you haven't heard, Calvin has an instagram. Now, Jiro also has an instagram. After looking through a few pictures on his instagram, it seems that he has had this account for quite a while; however, he just never expressed it out to all the fans.
Jiro's Weibo Update(2014-2-16)
Rough translation: Does everyone have an Instagram, this is mine. There will be some notes handy for shooting moods and signs where I will be going and staying. Track me. Haha Go! Go! Go!