As an historian, I consider anniversaries irrelevant. However, as a social function, naturally, they matter a great deal, and the internet itself moves so quickly at times that it’s worth looking back regularly to maintain perspective. Twitter itself, for example, is less than five years old, and I’ve been using it for about two years. About
a year two years ago, our erstwhile colleague Katrina Gulliver began cataloging historians on twitter under the title Twitterstorians, and now has a list of a few hundred participants, ranging from personal accounts to institutional ones to historical recreation and quotation lists.
Like any social media, a lot of what happens on twitter appears to be fluff and nonsense, even a lot of what comes from the accounts of bona fide historians. I consider twitter to be a kind of semi-professional discussion: not a private, personal space, nor a professional project, but a space for informal discussions on political, cultural, historical and educational matters (with the ocassional foray into fluff and nonsense, for fun). I do have some local colleagues on twitter, and there are a few other Japanese historians as well as a pretty good collection of non-historian Japan-interested folks.