Japan currently has about 123–124 million people , and the number is slowly decreasing each year due to low birth rates and an aging population.

Quick Scoop: Japan’s Population

  • Recent official and international estimates put Japan’s population at around 123.8 million in 2024.
  • Economic and demographic projections suggest it will be around 123 million in 2025–2026 , continuing a gentle downward trend.

Why the Number Is Falling

  • Japan has more deaths than births each year , leading to a negative natural population increase.
  • Long‑term projections show population continuing to shrink through the 2020s and beyond unless birth rates or immigration increase significantly.

TL;DR: If you’re asking “how many people in Japan,” the up‑to‑date ballpark is about 123 million residents today, and that figure is slowly going down over time.