Condo Repair Reserves Go Looking for Yield: First-Ever Extra Offering of Sumai-ru Bonds as Applications Top 6,000 Associations

The short version

Higher interest rates are not only changing mortgages. They are also changing where condominium buildings keep their repair reserve funds. The Japan Housing Finance Agency (JHF) issues "Mansion Sumai-ru" bonds for condominium owners' associations, and for fiscal 2026 the 10-year average rate rose to 2.000%. The agency is now running the first additional offering in the scheme's history, and 6,093 associations had applied as of 12 November ^[1]. For anyone buying a resale condo, this is a useful reminder: a repair reserve can be judged not only by how large it is, but also by how the association looks after it.

What happened

What the bonds are. Sumai-ru bonds are 10-year coupon bonds issued by JHF so that owners' associations of for-sale condominiums can set aside their repair reserves. One unit costs 500,000 yen, interest is paid once a year, and an association can keep buying for up to 10 rounds ^[2]. JHF issues them with government authorisation ^[2].

This year's rate. For bonds issued in fiscal 2026, the average annual rate over the full 10 years (before tax) is 2.000%. Buildings with a certified management plan receive 2.100%, and buildings rated highly under the industry bodies' management assessments receive 2.050% ^[1]. The standard rate in fiscal 2025 was 0.525% ^[3], so the change in one year is large.

Applications so far. The original offering ran from 13 April to 9 October 2026. An additional offering opened on 2 November and runs until 15 January 2027, first come, first served, closing once the quota is reached ^[1]. As of 12 November, the two offerings together had drawn 371,431 units from 6,093 associations: 4,529 standard, 883 certified and 681 assessment-based ^[1]. At 500,000 yen a unit, that is roughly 185.7 billion yen.

Compared with earlier years. Fiscal 2025 ended with 176,003 units from 3,371 associations. The previous record was fiscal 2024, with 205,458 units from 3,592 associations ^[3]. In other words, before this year's offering has even closed, the number of associations is about 1.8 times last year's full-year figure, and the number of units about 2.1 times. This year's total quota is 582,089 units, or 291.0445 billion yen, across the original and additional offerings ^[2], and a little over six-tenths of it has been taken up.

The fine print: 2.000% is a 10-year average

One point is easy to miss. The headline rate is the total interest over 10 years divided evenly; the rate for each year is not the same. For the standard bond it is 0.400% in year 1, 0.900% in year 5, then 2.260% in year 6 and 4.340% in year 10 ^[2]. One 500,000-yen unit held for the full 10 years earns 100,000 yen in interest before tax and 84,690 yen after tax; interest is taxed at source at 15.315% ^[2].

A bond can be cashed in early, one unit at a time and with no fee, once a year has passed since the association's first issue ^[1]. But because the interest is low at the start and high at the end, cashing in during the early years gives an effective rate far below 2.000%. The product therefore suits the part of a reserve that will not be needed soon, for example when the next major repair is still some years away.

There are conditions for applying. The building must have management bylaws, and its long-term repair plan must cover 20 years or more. JHF does not require a general-meeting resolution, but where the bylaws say that the way reserves are invested is a matter for the general meeting, the bylaws must be followed ^[2]. In addition, an association that holds Sumai-ru bonds gets a 0.2% a year reduction on JHF's loan for common-area renovation ^[1].

Another new option: retail government bonds for associations

The Ministry of Finance's retail government bonds ("Kojin-muke Kokusai") are being renamed "Kojin-muke Kokusai Plus" from the December 2026 offering, and sales are being widened to some corporations and organisations. Condominium owners' associations are named explicitly among those eligible ^[4]. The bonds are sold in 10,000-yen units and issued every month. The 10-year floating-rate type resets every six months at the reference rate × 0.66, with a floor of 0.05% ^[4]. They can be cashed in at any time once a year has passed since issue, but an amount equal to the last two interest payments (before tax) × 0.79685 is deducted ^[4].

The main difference is this. With Sumai-ru bonds, all 10 years of interest are fixed at issue, low first and high later, and the 2.000% is reached only by holding to maturity ^[2]. With the 10-year floating government bond, the rate moves with the market every six months and may rise or fall in future ^[4]. Which fits better depends on each building's repair plan and when the money will be needed; there is no single answer.

What this means if you are buying a resale condo

First, more associations are actively managing their money. Among associations that applied in fiscal 2025, 45.9% were buildings 25 years old or more, and the average age was 23.0 years. The most common reason given was that the bonds are issued by JHF and are therefore safe, at 59.5%, while "the yield is good" was 29.2% ^[3]. In Osaka Prefecture, 301 associations applied in fiscal 2025, behind only Tokyo and Kanagawa ^[3]. Resale condos in Osaka whose associations hold these bonds are not unusual.

Second, when you read the documents, ask where the reserve is kept. When you buy a resale condo, the management company's important-matters survey report states the total repair reserve and whether there are arrears. Beyond that, you can ask your agent to confirm whether the reserve sits entirely in an ordinary deposit or is partly in bonds, whether there is a long-term repair plan of 20 years or more, and whether the building has a certified management plan. A building that was able to apply for Sumai-ru bonds has, at the least, management bylaws and a reasonably long repair plan ^[2].

Third, holding bonds does not mean the reserve is sufficient. Interest is only a supplement. As shown above, the after-tax interest on one 500,000-yen unit over 10 years is 84,690 yen ^[2], which is small beside the cost of a single major repair. Whether the reserve is adequate depends on the level of the monthly contributions, on how realistic the long-term repair plan is, and on whether works are actually carried out when the plan says they should be.

Fourth, after you buy, you are one of the decision-makers. Once you are a unit owner, how the repair reserve is invested is decided by the association, which means by all the owners. Owners who do not live in Japan have voting rights too, so when the agenda for a general meeting arrives, it is worth reading the items on how the reserve is managed.

Summary

With rates higher, leaving the repair reserve in a bank deposit is no longer the only approach. Sumai-ru bonds are in their first additional offering with more than 6,000 associations applying ^[1], and from December associations can also buy the government's retail bonds ^[4]. For a buyer, the interest itself is not the point. The point is to use this as a clue to whether a building is carefully managed and whether its repair plan can be relied on. If a resale condo in Osaka has caught your eye, please contact us; we can help obtain and explain the documents on management and repair reserves.