Niji to Umi no Hospital (Rainbow and Sea Hospital), located in Hara, Karatsu City, Saga Prefecture, is a specialized psychiatric and psychosomatic medicine hospital operated by the medical corporation Karakokai. Founded in 1945 as Shindo Medical Clinic, the hospital has supported regional psychiatric care for over 70 years, relocating to its current facility in 2012 and relaunching under the name Niji to Umi no Hospital. The hospital's strengths include specialized expertise in child and adolescent psychiatry and stress care, alongside a comprehensive treatment system covering a wide range of psychiatric conditions such as dementia and addiction. Equipped with advanced diagnostic technology including MRI and brain function evaluation systems, the hospital practices early diagnosis and evidence-based treatment. In addition to pharmacotherapy, a diverse range of therapeutic approaches is employed, including occupational therapy, cognitive behavioral therapy, and return-to-work programs. A multidisciplinary team of physicians, nurses, pharmacists, psychologists, and occupational therapists work collaboratively to support each patient's social reintegration. The facility, which received the 25th Nikkei New Office Award, is designed with privacy and healing in mind. English-language support, credit card acceptance, barrier-free access, and ample parking ensure a welcoming environment for a diverse range of patients.