# R4 | openai/gpt-5.6-luna | run 1

## Prompt

As of the most recent available estimate, what is the population of Japan, and is it increasing or decreasing? Give the figure and year, and cite sources.

## Response

As of the latest available official estimate, **Japan’s population was approximately 122.93 million on July 1, 2026**. It is **decreasing**, down about **440,000 people, or 0.35%, from July 2025**. ([stat.go.jp](https://www.stat.go.jp/data/jinsui/new.html))

## Latest figure

- **Population:** 122,930,000 people
- **Reference date:** July 1, 2026
- **Status:** Preliminary estimate
- **Annual change:** Decrease of approximately 440,000 people, or 0.35% ([stat.go.jp](https://www.stat.go.jp/data/jinsui/new.html))

Japan’s latest completed annual estimate was **123,219,024 people in 2025**, down **582,726** from 2024. ([stat.go.jp](https://www.stat.go.jp/data/jinsui/pdf/202606.pdf))

The figures are published by Japan’s **Statistics Bureau, Ministry of Internal Affairs and Communications**; monthly estimates are revised when updated data become available. ([stat.go.jp](https://www.stat.go.jp/data/jinsui/new.html))

Would you like the figure broken down into Japanese nationals and foreign residents?
