I am back and I am rather dead after the journey, so just a few random words about Nintendo.
As for the videogame consoles market in Japan, Sony is utterly dead. In shop after shop, there were lots of PS3s and PSPs available, often at a discount. However, Nintendo Wii and DS Lite were completely sold out everywhere. There were used DS Lites being sold for 120% or 130% of the official price and they were sold out too.
In addition, I saw many adult people every day playing with DS on the train / in the subway. And I didn't see a single PSP being used by anyone.
DS software lineup includes many titles exclusively for adult users (i.e. not games but vocabularies, training programs, interactive cooking instructions...)
This is madness. No, this is Nintendo.