一増一減 (いちぞういちげん) — 16,800,000-year period over which a human lifespan increases from ten years to 84,000 years (by one year per century) and then decreases back to ten (by one year per century)
一増一減
16,800,000-year period over which a human lifespan increases from ten years to 84,000 years (by one year per century) and then decreases back to ten (by one year per century)
画像検索

実際には 16 が使用されます
検索結果 16
16
sixteen
十六
sixteen
一六
sixteen
