According to Google Translate version of The Wayback Machine cached copy of the now expired domain:
"Small bodies exploration Forum" is a group that joins us from various
positions for the next small bodies exploration of "Hayabusa" mission,
followed by the public debate by using the Internet, etc.. In this
site, I would like to introduce appropriate ones can be exposed from
those discussed in the group, and we have been featured information
various other related to solar system exploration further.
bodies exploration Forum Official page" is ::: Www.Minorbody.Com/ is
OK, the machine translation is slightly awkward, as expected, but the clue is there, the new location of this same web forum is: www.minorbody.com. Of course, that again lands us on a Japanese language only website, but at least it is still maintained. Well, kind of. Translating it, it reads as a referral website advertising pregnancy and ovulation test products. LOL. I'm not sure if it's some form of web domain hijacking, or also the newer domain registration expired, but it certainly doesn't have anything to do with where we started at.
So the initial description is so far all we have. It is web forum for what basically says on the box:
A community of people of various professions interested in the (then) next minor body exploration mission of the JAXA's Hayabusa spacecraft (JAXA Hayabusa page in Japanese).
This group is, according to its bulletin board, still active in the minorbody Yahoo Japan group. Translating its front page post, I got this:
Small bodies exploration forum (Minor Body Exploration Forum: MEF)
Description of the group:
In your hand, do not send out spacecraft
to the home of The Little Prince?
Hayabusa spacecraft JAXA Institute of Space and Astronautical Science
(ISAS) was launched in May 2003 , was brought back to earth a dazzling
return capsule in June 2010 . This group , that for small bodies
exploration of Japan following the falcon, to solicit ideas from all
over the country , and to consider the feasibility and engineering
approaches scientific significance , to create a powerful mission
candidate of scale that can be conducted by JAXA / ISAS it is a
volunteer organization for the purpose .
Since its inception in May 2000 , I looked at the exploration plan of
seven . In the Science Council of Japan and overseas , including the
Space Science Symposium of four times since 2001 , and has been
announced the examination result of integration plan to achieve it and
Science aim is next small bodies exploration . Issue a final version
in January " MEF report " Preliminary , '04 , was distributed at the
HP and the release on to the end of 2002 . Held a " small bodies
exploration WG " application launched preparatory meeting immediately
after , it was submitted to JAXA / ISAS Space Science Committee in
March , launched a petition that a starting point the same report .
Result of deliberation , " small bodies exploration WG " establishment
is approved , the purpose of the establishment of the MEF was achieved
So apparently, the purpose of this group was expanded to include planning of future candidate JAXA / ISAS missions to minor celestial bodies, and collect and promote ideas from all over Japan. It was also upgraded to a status of a volunteer based organization, and attends space exploration symposiums and some of its members might have a say in the Science Council of Japan? Don't know, this machine translation is somewhat hard to read.
The translation later reads as this group being open to members of any nations, but the language used therein is Japanese. Right. I really need find the time to learn Japanese someday, they seem to do pretty cool stuff as well.