Twitter is to launch a dedicated version of their growingly popular messaging service for Japan.

The new site is will be developed in partnership with Digital Garage, who as part of the deal has also made an investment in Twitter, “and will commit engineering and other development resources to help bring Twitter to Japan.”

The announcement follows a week where Twitter failed under the strain of users using the service to Twitter the Steve Jobs keynote at the Macworld Expo, part of a pattern of ongoing issues relating to the increasingly popular service going back over 12 months.

The amount of the investment was not disclosed, however here’s hoping that they’ll use the money to focus on service stability.