How do I request a manga called Hyakki Koiran to be added
I would try to message them via Facebook or their email. (You can find their email at the bottom where it says "Contact us.")
Has it been scanned an translated? If not, then try messaging a few scan groups to see if they are willing to do it.
Yea it has.
Then I suggest you just contact the site admin like @217 recommends. :D
Thanks
How do I request a manga called Hyakki Koiran to be added