I am very sorry to upset your protocol for asking questions. I came across the site about three hours ago while researching Japanese customs for a Master's degree in Forensic Nursing. Although I have scholarly articles, I would like to give APA citation credit to user uncovery for his/her response about communications. I can't figure out how to directly make contact, so I ask for your help!
However, you should generally be able to just cite the answer directly (check with your instructor to see if this is acceptable for your course); it's not generally necessary to contact the author before citing internet resources. APA style encourages you to cite the author's name as it is given in the source, so you can simply cite it to uncovery and provide the URL and other details.
In case you can't access to his website and take up contact directly, on it there's a link to his public Facebook page. The Facebook username is uncovery.photo.
I wish good luck for taking up contact with him. Be aware though that, judging from his posts, he hasn't been active on this site since June 2015.