As we've recently remarked here on Gamasutra, Nintendo's DS continues to dominate both hardware and software sales in Japan. But we looked to Ricciardi and Minamoto for some more explanation - is it that the DS is penetrating new retail stores, or is it just that existing stores are selling massive amounts of DS games? Riccardi comments of the games: "I think they're just being sold more in places they were already sold... Most people will buy their games at [large Japanese electronics retail stores] Bic Camera or Yodobashi Camera - you will get discounts [with a special loyalty card]."
But overall, Ricciardi noted that the DS has "...broken [games] into a much more mainstream thing than it used to be." For example, Minamoto's father recently bought a DS without any prompting from her. Ricciardi continues of the DS' near-total domination of the game charts: "I don't see it slowing down soon... [even though] you can't predict anything here.. it's penetrated so much." Minamoto adds: "So many people just bought the DS - they're not going to throw it out after 6 months.."
So why is DS especially popular in Japan - and may not ever reach that level in the West? Apart from the content being right, Ricciardi notes: "The culture here is more suitable to have a handheld game in the first place", with plenty of train journeys and other opportunities to play brief game sessions. Minamoto adds: "The Keitai [cellphone] industry opened up the possibility of playing games in such a way - that's why DS had an easier path."