Portable gasoline tanks are illegal in Japan and with the current prices there have been more and more signs saying so around gas stations. I even saw one in a train station today.

Those look pretty good. Train stations in Japan also have the same thing called eki-ben. Speicalized bentos (boxed lunches) that showcase locally produced food. Most of them are quite fancy and have some great packaging, some are even self heating.

Here's a few I ate last spring break.
http://sleepytako.blogspot.com/2008/04/eki-ben-and-other-eats.html

This map ignores Mixi which in Japan which seems to be the number one networking site.

More on Mixi and SNS use in Japan
http://whatjapanthinks.com/tag/mixi/

Mixi
http://mixi.jp/
(You need a valid Japanese cellphone to sign up however)