According to their official website, NIS America announced their licenses for Katanagatari and Arakawa Under the Bridge. Both series will be released in a Blu-ray Disc and DVD combination pack with English subtitles.

Katanagatari Volume 1 Premium Edition will be released on July 5, 2011 with the second volume being released in September. Volume 1 will include 6 episodes on 2 Blu-ray discs and 2 DVDs with a hard cover art. Included is also a book titled “Togame’s Travelogue.”

Katanagatari on NIS America's site


Arakawa Under the Bridge Volume 1 Premium Edition will contain all of the 13 episodes from season 1 and will also be released on July 5, 2011. Included is a 30+ page, full color, hardcover art book.

Arakawa Under the Bridge on NIS America's site


Sources: NIS America, NIS America's Katanagatari press release, NIS America's Arakawa Under the Bridge press release