According to this post from Sports Hochi(Japanese Language), citizens on the streets around Minute Maid Park may be in for quite a scare during the 2013 season. The Astros are considering GODZILLA (Hideki Matsui) as a possible DH for their first season in the American League.
Using a combination of the Japanese language knowledge I have retained from my 2.5 years living in that country and my skills with Google translate, I can tell you that the linked article includes a few quotes from Jeff Luhnow. Luhnow basically says is that the Astros have considered the 38-year old Matsui as they look to fill the DH position as they move to the American League. Luhnow also indicatesdthat a veteran OF like Matsui would be a good fit on a young club like the Astros.
2012 was Matsui's 10th year in the Major Leagues(all in the American League). He also spent 10 seasons with the Yomiuri Giants of Japan. In 10 seasons in the USA, Matsui has 175 home runs and a .282 batting average. He has played for the Yankees, Angels, Oakland and Tampa Bay.
Matsui started in his pro career directly out of high school as an 18-year old with Yomiuri in 1993. The card pictured above was part of a series distributed in Japan to commemorate the beginning of the young "Godzilla's" baseball career with the Giants(This card memorialized his second home run as a pro). In 10 years(1993-2002) with the Tokyo-based club, Matsui had 332 home runs, 889 RBI and a .304 batting average in 1268 games. The Giants won the Japan Series three times over the ten year period.