The initial flow of Japanese capital returning home has begun, but a larger repatriation of overseas assets remains stalled. Institutional investors are holding back, awaiting clarity on where Japanese government bond yields will ultimately peak and how much further the central bank must raise interest rates.

The Bank of Japan implemented a rate hike last week. However, two dovish dissenting votes at the BOJ's recent meeting, combined with a further selloff in bonds this week, intensified market uncertainty about the path ahead.

Major investors express reluctance to commit heavily to domestic bonds while yields continue rising. Policymakers have provided few specific clues about the extent of future rate increases. This prevailing caution is actively slowing capital repatriation, leaving one of the world's largest pools of overseas capital largely parked abroad.

Shoki Omori, a fixed income strategist at Deutsche Bank in Tokyo, said the "fast-money carry trade has already been unwound; the slow-money one has not started." He clarified that remaining capital flows are structural, including Japanese pensions and households that hold overseas assets unhedged. For the yen, this means the era of relentless declines may have concluded, but a durable strengthening trend has yet to materialize.

On Friday, the yen traded near 159 per dollar, having relinquished most of its sharp gains from early September. This level sits close to the 157 per dollar median six-month projection from a Reuters analyst poll conducted earlier this month.

The yen is down only about 1 percent for the year but touched a near four-decade low in July, just shy of 164 per dollar. Data shows short sellers have retreated in line with the currency's price action. Speculative positioning in the yen shifted from a deep net short to the largest net long since July 2025, reaching $9.7 billion in the first two weeks of September.

Major central banks have largely initiated rate hikes to address inflationary pressures. This suggests interest-rate differentials with Japan are unlikely to narrow in the near term, another headwind for sustained yen strength.

The underlying bond mathematics favoring domestic capital is straightforward. Benchmark 10-year Japanese government bond yields have surged two percentage points in under two years and now stand above 3 percent, marking a 30-year high and eroding the appeal of overseas debt. Omori confirmed that a hedged Treasury position now offers a Japanese investor less than domestic bonds. This shift in relative value provides a clear incentive for capital to remain within Japan's borders.

Japanese investors purchased 4.8 trillion yen of sovereign debt last month, marking the largest net purchase in three months, according to data analyzed by Barclays using Japan Securities Dealers Association figures. This included significant buying from banks and insurers.

HSBC estimates indicate Japanese banks have sold approximately $70 billion of foreign bonds this year, compared with purchases of $35 billion last year, signaling a substantial reallocation away from international debt markets.