The Reduced Cap Stays at ¥44,400 While a New ¥530,000 Annual Cap Appears — What the Freeze Changed in Japan's High-Cost Medical Benefit Was the Unit of Counting

Type of cap	Current	Original plan (frozen March 2025)	From August 2026
Monthly cap	¥80,100 + 1%	Raised by 10%	¥85,800 + 1%
Reduced cap after three months	¥44,400	¥48,900	¥44,400 (unchanged)
Annual cap	None	None	¥530,000 (new)

The reduced cap applies from the fourth month once a household has hit the monthly cap three times within twelve months. It works for people with costs almost every month, but not for people whose costs arrive every few months. The new annual cap covers that gap: once a household reaches it, nothing further is owed for the rest of the year, even if no single month reached the monthly cap. Sources: the MHLW summary of the revision, and Document 2 of the 192nd Medical Insurance Subcommittee, 23 January 2025.

Out-of-pocket medical costs in Japan are capped by the month. From August 2026 that cap rises. For the bracket covering annual income of roughly 3.7 to 7.7 million yen, ¥80,100 plus 1% becomes ¥85,800 plus 1%[1]. The highest bracket moves from ¥252,600 plus 1% to ¥270,300 plus 1%, and the residence-tax-exempt bracket for those under 70 moves from ¥35,400 to ¥36,900.

So far this is only a story about amounts rising. What follows is the part worth looking at.

A household that has reached the ceiling three times in the preceding twelve months gets a lower ceiling from the fourth month. This is the reduced cap for repeated months, set at ¥44,400 for the 3.7 to 7.7 million yen bracket. That figure stays at ¥44,400[1]. The monthly ceiling rises while the ceiling for people whose costs continue does not move.

On top of that, a ceiling that did not exist before is added: an annual one. For the 3.7 to 7.7 million yen bracket it is ¥530,000[1]; for the highest bracket ¥1,680,000, and for the residence-tax-exempt bracket ¥290,000. The ministry's own document states the purpose.

With a view to also considering the financial burden on long-term patients who do not qualify for the reduced cap for repeated months, an annual cap is newly introduced. As a result, even a person who does not reach the monthly ceiling owes nothing further for that year once the annual cap is reached.

From August 2027 the income brackets are divided more finely again, and the highest monthly ceiling becomes ¥342,000 plus 1%.

This revision was stopped once along the way.

The first draft was presented to the Medical Insurance Subcommittee of the Social Security Council on 23 January 2025. It raised the ceiling for each income bracket and then split every bracket except the residence-tax-exempt one into three. The increases were set at 15% for annual income above roughly 11.6 million yen, 12.5% from roughly 7.7 to 11.6 million, 10% from roughly 3.7 to 7.7 million, and 5% below roughly 3.7 million.

The same document carries a worked example. For a person under 70 in the 3.7 to 7.7 million yen bracket with medical costs of 3 million yen, the out-of-pocket ceiling went from ¥107,430 to ¥115,260, and in the case of the reduced cap for repeated months from ¥44,400 to ¥48,900[2]. The original draft raised the ceiling for people in long-running treatment as well.

On 7 March 2025 this stopped. Prime Minister Ishiba announced that the whole revision, including the across-the-board increase planned for August, would be held back. Patient groups had raised the concern that people would avoid seeking care, and it was stated that criticism of the review process as lacking care would be taken seriously.

What was put in its place was a specialist committee. The Specialist Committee on the Design of the High-Cost Medical Expense Benefit opened on 26 May 2025 and ran to its ninth session on 25 December. The ministry's document states plainly that nine sessions were held with the participation of members representing patient groups, insurers, and labour and management. What takes effect in August 2026 came out of those nine sessions.

Set the original draft beside the final one and a difference stands out ahead of the amounts: whether to raise the reduced cap for repeated months. The draft put it at ¥48,900. The final plan left it at ¥44,400.

That is what the objection moved. The ceilings themselves still rise in the final plan. In the 3.7 to 7.7 million yen bracket, ¥80,100 plus 1% becoming ¥85,800 plus 1% means a heavier burden for someone who pays up to the ceiling once. The reduced cap, though, has not moved.

Why did that point become the focus? Because the reduced cap counts months. It takes three occurrences within twelve months before the fourth month is covered. It reaches someone with hospital stays or expensive medication almost every month, and never reaches someone whose costs arrive once a quarter or twice a year. A household can pay a great deal across a year and still not be counted as long-term, simply because the months did not line up.

The annual cap sits exactly where that counting fails. Reach the annual total and nothing more is owed that year, even without a single month at the ceiling. Change the unit from months to years, and the same person appears differently.

The way the level was set carries the same design. The ¥530,000 annual cap for the 3.7 to 7.7 million yen bracket averages about ¥44,200 a month, ¥200 below the ¥44,400 reduced cap. The ministry notes that the monthly average of the annual cap was set below the reduced cap. Someone picked up by the year ends up slightly lighter than someone picked up by the month.

The remaining question is whether this reaches people at all. A monthly ceiling settles at the hospital counter; an annual total accumulates across several providers and several months. The problem examined under non-take-up can occur here too. For some lower-income brackets the document notes that the annual cap applies to those confirmed to fall within them, with reimbursement paid from August 2027 onward. It stops at the counter for some and comes back afterwards for others.

Adding one more ceiling brings inside the system a group that the method of counting had been leaving out. Needing to count separately what has been provided and what has arrived is the same structure taken up in policy exclusion and non-take-up（このサイトの記事）. The question of which unit to measure burden in also runs alongside Japan's ¥135.5 trillion social security breakdown（このサイトの記事）.

Further Reading

• 医療保険制度の再構築:失われつつある「社会保険としての機能」を取り戻す (Rebuilding the Health Insurance System: Recovering Its Function as Social Insurance)（外部サイト、新しいタブで開きます） (Kazuhiko Nishizawa, Keio University Press). An examination of how premiums, out-of-pocket payments and public funds relate to one another in the design of the system. Useful for placing the ceilings discussed here within insurance as a mechanism.

References

Reference: On the Revision of the High-Cost Medical Expense Benefit — Ministry of Health, Labour and Welfare, Health Insurance Bureau (2026). Ministry of Health, Labour and Welfare

On the Revision of the High-Cost Medical Expense Benefit (Document 2, 192nd Medical Insurance Subcommittee, Social Security Council) — Ministry of Health, Labour and Welfare, Health Insurance Bureau (2025). Ministry of Health, Labour and Welfare

Social Security Council: Specialist Committee on the Design of the High-Cost Medical Expense Benefit — Ministry of Health, Labour and Welfare (2025). Ministry of Health, Labour and Welfare

For Those Using the High-Cost Medical Expense Benefit — Ministry of Health, Labour and Welfare, Health Insurance Bureau (2026). Ministry of Health, Labour and Welfare