Why Japanese People Keep Their Teeth at 80

What if the number of teeth in your mouth could quietly predict how long you live? In one of the largest studies of its kind, researchers in Japan followed more than 190,000 older adults — and found that the people who kept more of their teeth tended to live longer. Long before the rest of the world noticed, Japan turned this discovery into a national health goal called 8020. In this video, Emi unpacks the real science connecting your teeth, your brain, and your lifespan — what the 8020 rule actually means, and the simple, proven Japanese habits you can start tonight to protect your teeth (and your health) for decades to come. 🎌 What you'll learn in this video: What a massive Japanese study revealed about your teeth and how long you live Why Japanese researchers spotted this link decades before anyone else What "8020" really means — and why 20 teeth is the number that matters most The honest truth about tooth loss, your brain, and your memory 4 science-backed Japanese habits to keep your teeth for life: – The prevention-first mindset (regular professional cleanings, not just emergencies) – Why a daily cup of unsweetened green tea quietly works in your favor – How chewing thoroughly switches on your body's own built-in tooth protection – The silent danger after 40 — and the simple daily habit that stops it As always on Jutori Japan, every claim here is backed by published research — and where the evidence is a link rather than proof, we tell you honestly. 📌 Sources mentioned: University of Osaka — study of 190,282 adults aged 75+ on tooth condition and mortality (2026) The Takayama Study — "Number of Teeth and All-Cause and Cancer Mortality in a Japanese Community" "Number of teeth and 5-year mortality in an elderly population" — Japanese cohort study Japan Gerontological Evaluation Study (JAGES) — 7-year cohort on tooth loss and mortality (Scientific Reports, 2025) The Hisayama Study — tooth loss and dementia risk (Journal of the American Geriatrics Society, 2017) Nakajima MRI cohort — tooth loss and brain atrophy in older Japanese adults The 8020 Campaign — Japan's Ministry of Health & Welfare and the Japan Dental Association (launched 1989) Green tea & oral health — Ohsaki Cohort 2006 (Koyama et al., Preventive Medicine, 2010); Kushiyama et al. (Journal of Periodontology, 2009) If you found this helpful and enjoyable, consider subscribing to Jutori Japan for more honest, research-backed lessons on Japanese philosophy, psychology, and the art of living well. 🍵 #JapaneseLongevity #OralHealth #HealthyAging