Twitter's 20 billionth tweet

So that means the barrage might come back later all at once," wrote the graphic designer and avid fan of the Tokyo Yakult Swallows baseball team in Japanese.

It didn't take long before GGGGGGo_Lets_Go was inundated with congratulatory messages from around the world for hitting the social networking milestone. The user bio changed shortly thereafter.

"I'm grateful and humbled by those who are visiting because of my 20 billionth tweet. Be warned, I tweet a lot about baseball."

While it took Twitter four years to reach tweet number 10 billion earlier this year in March, it took less than five months to double the figure thanks to its increasing popularity worldwide.

Twitter Chief Executive Evan Williams traveled to Tokyo earlier this month to celebrate its success in Japan.

"We've come a long way in two years especially in Japan," he told an enthusiastic crowd of about 500.

Japanese Twitter users set a world record when the whistle blew in the World Cup game, in which Japan beat Denmark at 3,283 tweets per second, mostly believed to have been Japanese. About 16 percent of Japanese Internet users tweet, surpassing the 9.8 percent of online Americans.

The company launched a Japanese language version in 2008 and released a mobile site in October.

One reason Twitter has been popular in Japan is that it's possible to say much more in Japanese within the 140-character limit. The word "magazine," for example requires just two letters in Japanese. Telegraph