Twitter, the microblog platform, is going to Japan, officially, and has received an undisclosed amount of investment (though small) from local investment firm Digital Garage, according to reports. The company has said previously that about 20 percent of its traffic comes from Japan, so this move to have local presence seems logical.

The service is supposed to be launched in Spring this year, the report says. Digital Garage is the incubator founded by investor Joi Ito, and has invested in Technorati Japan with Technorati.

Gen Kanai: One of the market differences Twitter faces in Japan is that Japan does not use SMS on mobile phones..e-mail is used.