Monetary Base in Japan decreased to 605225.70 JPY Billion in December from 614655.20 JPY Billion in November of 2025. Monetary Base in Japan averaged 150777.18 JPY Billion from 1970 until 2025, reaching an all time high of 678241.10 JPY Billion in April of 2022 and a record low of 4328.80 JPY Billion in January of 1970. source: Bank of Japan

Related	Last	Previous	Unit	Reference
Interest Rate	0.75	0.75	percent	Jan 2026
Monetary Base YoY	-9.80	-8.50	percent	Dec 2025
Money Supply M0	110802.00	110827.00	JPY Billion	Dec 2025
Money Supply M1	1089787.20	1085071.80	JPY Billion	Dec 2025
Money Supply M2	1278647.50	1276680.50	JPY Billion	Dec 2025
Money Supply M3	1627116.50	1624400.10	JPY Billion	Dec 2025

Japan Monetary Base

The Monetary Base reflects changes in the total amount of currency in circulation and current account deposits held by financial institutions at the Bank of Japan. An expansion in the monetary base typically stimulates spending and economic activity, which can, in turn, increase inflationary pressures.