# Japan Monetary Base, average amounts outstanding

Japan Monetary Base, average amounts outstanding was down 13.6% year on year in October 2026, compared with −15.2% in September 2026.
The level stood at 5,325,717 100 million JPY.
Over the past ten years it has ranged from −15.7% (Aug 2026) to 24.3% (Apr 2021), averaging 4.7%.

- Source agency: Bank of Japan
- Makrognosis code: `JP.MONBASE.M.NSA`
- Frequency: monthly
- Units: 100 million JPY
- Coverage: 1996-01-01 to 2026-10-01 (370 observations)
- Page: https://makrognosis.robomacro.com/data/japan/monetary-base-average-amounts-outstanding

## Recent data

| Period | Value | Y/Y % |
|---|---:|---:|
| October 2026 | 5,325,717 100 million JPY | −13.6 |
| September 2026 | 5,328,464 100 million JPY | −15.2 |
| August 2026 | 5,430,070 100 million JPY | −15.7 |
| July 2026 | 5,549,259 100 million JPY | −13.8 |
| June 2026 | 5,592,039 100 million JPY | −13.7 |
| May 2026 | 5,757,634 100 million JPY | −12.2 |
| April 2026 | 5,829,256 100 million JPY | −11.3 |
| March 2026 | 5,707,875 100 million JPY | −11.6 |
| February 2026 | 5,809,326 100 million JPY | −10.6 |
| January 2026 | 5,894,035 100 million JPY | −9.5 |
| December 2025 | 5,941,943 100 million JPY | −9.8 |
| November 2025 | 6,126,869 100 million JPY | −8.5 |
| October 2025 | 6,165,980 100 million JPY | −7.8 |
| September 2025 | 6,281,080 100 million JPY | −6.2 |
| August 2025 | 6,437,775 100 million JPY | −4.1 |
| July 2025 | 6,438,964 100 million JPY | −3.9 |
| June 2025 | 6,479,525 100 million JPY | −3.5 |
| May 2025 | 6,560,120 100 million JPY | −3.4 |
| April 2025 | 6,569,773 100 million JPY | −4.8 |
| March 2025 | 6,458,519 100 million JPY | −3.1 |
| February 2025 | 6,499,369 100 million JPY | −1.8 |
| January 2025 | 6,511,079 100 million JPY | −2.5 |
| December 2024 | 6,585,240 100 million JPY | −1.0 |
| November 2024 | 6,697,481 100 million JPY | −0.3 |

## API

```
curl -H "X-API-Key: $MAKROGNOSIS_KEY" \
  "https://makrognosis.robomacro.com/v1/series/JP.MONBASE.M.NSA"

# Python
import requests
r = requests.get("https://makrognosis.robomacro.com/v1/series/JP.MONBASE.M.NSA",
                 headers={"X-API-Key": KEY})
obs = r.json()["observations"]
```