Seikai Hospital, operated by Medical Corporation Seiseikai, is an internal medicine clinic located in Nishi-Koiwa, Edogawa Ward, Tokyo. The facility is equipped with English language support, parking, and barrier-free accessibility. The clinic offers influenza vaccinations, including thimerosal-free mercury-free vaccines. Age-based pricing is available: residents of Edogawa Ward with vaccination vouchers can receive 2 doses for 1,000 yen under 3 years old, 2 doses for 1,500 yen under 13 years old, 1,500 yen for ages 13-18, 2,500 yen for those 65 and older, and free for those 75 and older. COVID-19 vaccinations are also available, with a choice between Pfizer's Comirnaty and Takeda Pharmaceutical's Nuvaxovid. For routine vaccination recipients aged 65 and older, or those 60 and older holding a Grade 1 Physical Disability Certificate, the cost is 2,500 yen, while those 75 and older receive it free. Vaccination vouchers issued by Edogawa Ward are required for both vaccines.