One thing to note is that all fairs are an opportunity in Japan. Mother’s day, baseball, Halloween, Christmas, New Year, you name it, anything works!
IN december, near Yoyogi park, adjoining the NHK buildings, there was this amazing blue alley, every day at 17h00, it would switch on along the 750m that lead up to Shibuya.
They used to have this in Meguro but moved it there 3 years ago. it is a fairy tale when all lightens, I was very impressed. If you are in town in December, dont miss out, it is worth the moment, try to be there at 16h50 to see the launch any evening of the week. You may also enjoy it in 6 others cities across the country – Nagoya, Sendai, Sapporo, Hiroshima, Osaka and Fukuoka.