T he five young members of 4Minute sit dressed in tight, black leather outfits at a luxury hotel in Ebisu, Tokyo. It's one day before their Japanese debut, but they show no signs of nerves.

The group's first concert here, at the 1,500-capacity Shibuya AX, turned out to be impressively packed to the rafters with screaming teenage girls. More notably, though, was the large number of music industry representatives also in attendance. This comes despite the fact the girls have not yet released any music in Japan.

Having spent the last few weeks wooing media and gaining fans in Hong Kong, Taiwan and Thailand, Nam Ji Hyun, 20, says coyly, "This is just the start."