According to the translation of the readme, this is a sand alone browser for the PSP. At this time it appears to only support browsing of http://www.2ch.net/ , so if you do not read Japanese, you might not be too interested in this. Here is the changelog translation:

DHCP not supported
might be full of bugs
use at your own risk...
if the console freezes while loading 2ch threads, push and hold the power switch for 10 seconds to force termination
Changes in this version

act as Mozilla for getting data
can cache data on MS
board category settings file format changed
can exit by pressing HOME button
Misc.
mono font is yet to be fixed

site officiel

téléchargement