Japan's Megabanks to Boost Foreign Bond Investments Amid Contrasting Interest Rates

Japan's megabanks, Mitsubishi UFJ Financial Group, Sumitomo Mitsui Financial Group, and Mizuho Financial Group, are expected to increase foreign bond investments while scaling back on local government bonds. This move aims to capitalize on the contrasting interest rate cycles in Japan and other economies. The banks are likely to shift their focus to foreign markets with higher interest rates, such as the US, to boost their returns.

Japan's leading megabanks, Mitsubishi UFJ Financial Group, Sumitomo Mitsui Financial Group, and Mizuho Financial Group, are expected to increase their foreign bond investments while scaling back on local government bonds. This strategic shift aims to capitalize on the contrasting interest rate cycles between Japan and other economies, particularly the United States.

The banks are likely to focus on markets with higher interest rates, such as the US, to boost their returns. According to recent data, these megabanks have significantly increased their holdings of foreign bonds, including US Treasuries, over the past several years. This trend is expected to support the banks' earnings and help achieve income targets in the current fiscal year ending March 31, 2026 [2].

Hideo Oshima, a senior economist at the Japan Research Institute, noted that investing in Japanese government bonds would be riskier due to rising interest rates in Japan. Conversely, US interest rates are expected to continue their downward trend, making it easier for Japanese banks to raise funds and invest in less-risky foreign bonds. The prices of existing bonds move inversely with interest rates [2].

The US Federal Reserve is anticipated to resume rate cuts, with the first reduction likely in September. Economists expect the Fed to cut rates two times in 2025, increasing the urgency for Japanese banks to buy US Treasuries as prices may rise. The Fed maintained its policy rate between 4.25% to 4.5% at its July policy meeting after its last cut in December 2024 [2].

"The stability of the unemployment rate and other labor market measures allows us to proceed carefully as we consider changes to our policy stance. Nonetheless, with policy in restrictive territory, the baseline outlook and the shifting balance of risks may warrant adjusting our policy stance," Fed Chair Jerome Powell said at the annual Jackson Hole conference in Wyoming on Aug. 22 [2].

Economists took Powell's remarks as an indication of a possible rate cut at the Fed's policy meeting on Sept. 16-17. "Powell showered a clear assessment that the downside risk to unemployment is growing," Takahide Kiuchi, executive economist at Nomura Research Institute, said in a note on Aug. 25 [2].

The US 10-year yields declined to 4.217% on Aug. 28 from 4.556% at the beginning of the year, pushing up prices. Meanwhile, the yields of Japanese government bonds shot up to 1.611% from 1.114% during the same period, causing some unrealized losses for investors. Bond yields move inversely to their prices [2].

"The financial markets are factoring rate cuts in the US, preventing the Japanese yen from spiking against the dollar and Japan's exports from tumbling," said Masahiro Ichikawa, chief market strategist at Sumitomo Mitsui DS Asset Management [2].

Rate hikes in Japan would also be supported by the US-Japan trade deal that alleviates the uncertainties for the Japanese economy. Some economists forecast another 25-basis-point hike as soon as October. The Bank of Japan left its policy rate at 0.5% at its policy meeting on July 31, the fourth consecutive stand-pat call [2].

Mitsubishi UFJ Financial Group increased its outstanding holdings of foreign bonds, including US Treasurys, to ¥24.375 trillion at the end of its fiscal first quarter in June 2025 from ¥22.03 trillion in March 2022, the end of the fiscal year. Japan's biggest lender by assets cut back on its Japanese bond investments, including government bonds, by more than half to ¥17.263 trillion from ¥40.434 trillion during the same period [2].

Sumitomo Mitsui Financial Group lifted its foreign bond holdings to ¥18.656 trillion from ¥12.056 trillion during the same time frame, data from the lender shows. In Japan, the bank curtailed its holdings of yen bonds to ¥11.521 trillion from ¥19.56 trillion. Mizuho boosted its overseas bond purchase to ¥11.411 trillion from ¥8.938 trillion while slashing its domestic bonds to ¥12.934 trillion from ¥28.62 trillion [2].

Spokespeople at the three banks declined to discuss their asset allocation strategy. "They won't make big bets on the Japanese bonds before rates move up," said Toyoki Sameshima, a senior analyst at SBI Securities Co. [2].

The Japanese megabanks were mired in bloated unrealized losses from their foreign bond investments after the collapse of US regional lender Silicon Valley Bank in March 2023 roiled the US financial market. Mitsubishi UFJ Financial Group, for example, posted a latent loss of nearly ¥1 trillion in the following year before reducing it to ¥70 billion in June 2025 [2].

As of Sept. 2, US$1 was equivalent to ¥148.22 [2].

References:
[1] https://seekingalpha.com/article/4818776-japan-megabanks-expected-accelerate-foreign-bond-investments
[2] https://www.spglobal.com/market-intelligence/en/news-insights/articles/2025/9/japans-megabanks-expected-to-accelerate-foreign-bond-investments-92095851