Have you ever seen 「toumyou」?
Every once a year, we have "toumyou(light up)" festival around Hakata district
starting from 18:00 till 21:00.
You need to walk around the Hakata to see all the lights.
Its takes about 3hrs.
If you have a chance to visit Fukuoka, please visit Tomyou festival :)
I am sure you will enjoy beautiful romantic night walk!
Event details:
(English site is from Fukuoka now article)
* Event for 2015 has already finished.