JAL to Tokyo EP is available once again on the iTunes Store Japan, now in iTunes Plus (DRM-free) format. People who previously purchased the EP can upgrade to iTunes Plus for ¥450.
http://itunes.apple.com/WebObjects/M...24113&s=143462
¥1500 Gift Cards are available for US$20.00 from this seller. I have bought from him before. Unfortunately, ¥1500 seems to be the smallest amount available.
http://cgi.ebay.com/ws/eBayISAPI.dll...m=370155578924
Once you obtain an iTunes Japan gift card code, you can redeem it using the steps here:
http://www.jbox.com/PRODUCT/ITUNESCARD