# R4 | openai/gpt-5.4-mini | run 2

## 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

Japan’s most recent official population estimate is **122.93 million** as of **July 1, 2026**, and it is **decreasing**. The Statistics Bureau of Japan’s population estimate page gives that figure, and its statistical handbook notes that Japan’s population has been declining since the 2015 census and fell again from 2020 to 2025. ([stat.go.jp](https://www.stat.go.jp/data/jinsui/index.html))

## Bottom line
- **Population:** 122.93 million
- **Year/date:** July 1, 2026
- **Trend:** Decreasing ([stat.go.jp](https://www.stat.go.jp/data/jinsui/index.html))

Would you like the same answer using the latest **census** figure instead of the monthly estimate?
