Funny, I see your feed just fine.
Looking at the feed validation report though it appears like you have some errors in one of your posts that is probably killing your feed. Feeds are finicky. It looks like it is in this post: http://haikugirl.wordpress.com/2011/08/06/food-and-drink-at-hyper-japan/ .
Go to settings > writing and select "WordPress should correct invalidly nested XHTML automatically" and then click "save changes."
Now, open the above post in the editor, switch from the visual tab to the HTML tab (waiting for the page to refresh) and then switch back to the visual tag (again waiting for it to refresh), and then click "update post." Then use the "is my blog working" link timethief referenced above to see if the feed is now working. It may take a few minutes for the feed to update.