Wife wants me to fix my snoring for her Christmas present lol… Sleep clinic recommendations?

So, the wife said the only thing she wants for Xmas this year is for me to see a specialist about my snoring. I told her I'd be happy to oblige, be it a CPAP machine or otherwise. Does anyone have any recommendations for sleep clinics in either the Osaka or Kyoto area? Further is fine, just a preference.

Edit: it's not a bodyweight issue for those suggesting weight loss.

by TNBVIII