Anyone know how to send fan mail to someone in the industry?

[Dareon]

So I recently found out that Riku Sanjo basically is responsible for 3 1/2 of 6 of my top 3 KR and SS combined and I kinda want to send fan mail or at least a thank you to him. Do any of you have any idea how I'd go about it? I can't find any twitter of his or a facebook. I just sincerely wish to thank him for such joy he's helped bring

[Lunagel]

For actors/idols you can send to their agency but I'm not sure about writers... He doesn't have a social media presence and usually the industry is pretty good about keeping people's privacy so I really don't think there is any surefire way to get anything to him directly

[takenoko]

I love Sanjou Riku, he's also responsible for Bouken-Oh Beet. If he doesn't have a social media presence then you'd probably want to reach out to the publisher of whatever medium you enjoy. Like if it's toku related, you'd probably write to Toei. Or if it's manga, you'd want to write to the publisher. Stuff like that