I found the Famitsu numbers for Minna no Golf Portable :
400K LTD ( in Japan ) and 66K first week ( but like I said previously it was a launch title so it didn't enjoy the large userbase of PSP of nowadays )
http://www.japan-gamecharts.com/psp.php
“In the entertainment business, there are only heaven and hell, and nothing in between and as soon as our customers bore of our products, we will crash.” Hiroshi Yamauchi
TAG: Like a Yamauchi pimp slap delivered by Il Maelstrom; serving it up with style.