EuroWire, TOKYO: Japanese long-term government bonds recorded net inflows from foreign investors during the week ended Jan. 3, marking the first such inflow in three weeks, according to official data released on Thursday. The return of overseas buying followed a period of consecutive weekly outflows and came at the start of the new calendar year, when portfolio positions are often reset. The data was reported by Kyodo News and sourced from figures published by Japan’s Ministry of Finance.
Foreign investors purchased approximately 273.5 billion yen, or about $1.74 billion, worth of Japanese long-term debt securities during the week, the ministry said. The net buying represented the first weekly foreign purchase of long-term Japanese bonds since the week ended Dec. 13. In the intervening weeks, overseas investors had been net sellers, reflecting a period of reduced foreign participation in the long end of Japan’s government bond market toward the close of 2025.
The Ministry of Finance data covers cross-border transactions in Japanese securities and is closely watched by market participants as an indicator of international demand for the country’s sovereign debt. Japanese government bonds remain among the most actively traded fixed-income instruments globally, given the size of the market and the large outstanding volume of debt. Movements in foreign holdings are regularly tracked to assess shifts in international investment flows.
The latest figures follow a policy decision announced late last month regarding government bond issuance. On Dec. 26, Japanese policymakers approved a plan to issue 17.4 trillion yen of super-long government bonds in the fiscal year beginning April 1, 2026. According to official statements, this represents the smallest amount of super-long bond issuance in 17 years. Super-long bonds typically include maturities of 20 years or longer and form a distinct segment of Japan’s government debt market.
Japan’s long-term debt instruments drew substantial foreign interest over the course of 2025. Data from the Ministry of Finance shows that net foreign inflows into Japanese long-term bonds totaled approximately 14.5 trillion yen during the year, the highest annual figure on record. The cumulative inflows highlight sustained overseas participation in the market across multiple months, despite periodic fluctuations in weekly data.
Short-term Japanese government securities also recorded net foreign inflows during the most recent reporting period. According to the same Ministry of Finance data, foreign investors bought a net 137 billion yen worth of Japanese short-term bills in the week ended Jan. 3. This followed a significant reversal at the end of last year, when short-term instruments experienced heavy selling by overseas investors.
Foreign participation remains key to Japan debt markets
In the final week of 2025, foreign investors sold approximately 4.45 trillion yen worth of Japanese short-term bills, marking one of the largest weekly outflows from that segment in recent years. The selloff was attributed in official reporting to concerns surrounding interest rate conditions, which contributed to reduced foreign exposure to short-dated Japanese securities at that time. The subsequent inflow in early January represents a change in weekly flow direction for short-term instruments.
The Ministry of Finance releases weekly data detailing foreign transactions in Japanese equities, long-term bonds, and short-term bills, providing a detailed snapshot of cross-border capital movements. These figures are compiled from reports submitted by financial institutions and are published with a short time lag. The data is widely used by domestic and international analysts to monitor trends in foreign investment behavior.
January figures show directional change in flows
Japan’s government bond market remains one of the largest in the world, with a broad range of maturities and a diverse investor base that includes domestic institutions, the central bank, and overseas investors. Weekly flow data, such as the figures released on Thursday, offers insight into near-term changes in participation by foreign buyers and sellers across different segments of the market, without reflecting price movements or valuation changes.
The latest weekly inflows into both long-term bonds and short-term bills indicate renewed foreign participation at the start of 2026, following notable volatility in flows at the end of the previous year. The Ministry of Finance figures provide a factual record of these movements, showing how foreign investment in Japanese government securities shifted during the first week of January.