Speaking of iPhones: If you're still trying to find one in stock in Japan, weekends may be your best bet. Neither Apple Japan nor Softbank Mobile are making big announcements about availability, but Business Computer News' analysis of sales data found spikes in iPhone 3G sales on July 18 (Friday), and July 25-26 (Friday and Saturday), pointing to the timing of shipments. As reported earlier, the two iPhone 3G models snapped up 45% of all mobile phone unit sales in Japan on July 11, but plunged to single digits soon afterward due to simple lack of stock. On July 26, however, the 16GB iPhone 3G regained the top-selling mobile phone slot, with 8.8% of unit sales. (The 8GB model rose only to #16, at 1.6%.)  
http://bcnranking.jp/news/0807/080728_11375.html (Japanese)