Patient Testimonials | Goichi Shiotsu DDS | Mercer Island Dentist At Goichi Shiotsu, DDS, we provide testimonials that are written by recent patients. Click here to see them today! Goichi Shiotsu, DDS, 2825 80th Ave SE, Suite 3, Mercer Island WA 98040 ~ (206) 232-3600 ~ mercerislanddental.com ~ 7/27/2022 ~ Tags: dentist Mercer Island WA ~