The URL for the main blog in Japanese has been changed as follows
Old: http://chasing-after-rainbows.blogspot.com
New: http://虹を追いかけて.blogspot.com
Alternatively, you can use http://xn--n8jos8fqkx000ci6n.blogspot.com or http://tinyurl.com/6b4aww to go to the website. The old URL will now redirect you to the English version.