It turned out that there is a mistake in the contents of the Garden Photo Contest described in the official brochure 5 page of Hokkaido Garden Highway.
There is an error in the hashtag required for posting in Instagram etc.
Due to my lack of knowledge, I could not use characters that can not be used as a hashtag.
Please delete the "/" and post it as below.
(Incorrect) # hgp / pic
(Correct) # hgppic
Add the following three hashtags and post them on your Instagram or Facebook.
# Hokkaido Garden Road # hgppic # hokkaidogarden
Thank you very much.