CinemaToday has posted coverage of Dogstar’s press conference during their visit to Japan in June 2000 for eight concert dates. The posted is dated June 24, 2000 and includes the transcript from the press conference, which took place at Tower Records Shibuya, in Tokyo, Japanese along with 20 photos (click the blue arrow at the bottom to get to the rest of the photos). Dogstar was promoting the upcoming release of Happy Ending CD.
Many thanks to Ayako who tweeted the link to this additional article in CinemaToday that was posted on June 28, 2000 that has additional info and two more photos.
Here is a clip from the CK DVD collection from the Japan trip. It contains segments TV coverage of some of the promo interviews as well as snipets from the press conference.