As part of the partnership Twitter says that “Tweets will be integrated into various services on Yahoo Japan, beginning with real-time results pages. This partnership will allow Twitter content to reach even more users in Japan, one of our biggest international markets.”
This is a big deal because not only is there a huge Twitter userbase in Japan, but it is also the country that the service has worked most closely with since their inception.
Twitter also recently struck a deal with NTT DOCOMO, Japan’s largest carrier, to include Tweets and Twitter content in NTT DOCOMO i-mode portal search results.
It’s also important to note that Yahoo was reportedly looking to sell Yahoo Japan to Japanese carrier Softbank, which already controls 42 percent of the subsidiary. If that deal takes place, it would be convenient considering Softbank already has a deal in place with Twitter to include the messaging and communications app pre-installed in Softbank’s cell phones.