Skip to content
activeEconomy

Japan Core CPI YoY in 2026

Post

This market will resolve to the percentage change in the Japanese Consumer Price Index excluding fresh food (All items less fresh food, change from the previous year (%)) between 2025 and 2026 according to the Consumer Price Index Annual Report by the Statistics Bureau of Japan (SBJ).

Current leader

67.3%

67%

Largest 24h move+1.3 pp 24h
24h volume
$1.8K
Liquidity
$5.7K
Scheduled close

Top candidates

2 outcomes

  • Will Japan's core CPI increase by between 2.0 and 2.4% in 2026?

    -2.1 pp 24h67%
  • Will Japan's core CPI increase by less than or equal to 1.9% in 2026?

    +1.3 pp 24h28%

Now Gained in 24h Lost in 24hChanges are in percentage points (pp).

Latest update

PlungeMonitoring only

Will Japan's core CPI increase by between 2.0 and 2.4% in 2026? — probability falls to 66.5%

The tracked probability fell to 66.5%, down 3.5 percentage points from 70.05% in the latest observation window. No evidence-qualified public source was supplied, so this remains a monitoring note rather than a causal explanation.

Yes: 70% → 67%

-3.5 pp
Sources and full timeline

Story so far

Recently updated

The tracked probability fell to 66.5%, down 3.5 percentage points from 70.05% in the latest observation window. No evidence-qualified public source was supplied, so this remains a monitoring note rather than a causal explanation.

A sourced or deterministic market update is available.

Known catalysts

Supported by the sources below

  • No catalyst has been confirmed yet.

Unresolved questions

What the evidence doesn’t settle

  • Watch further market observations and reporting about this contract. This update has not been enrolled for editorial research.

People and institutions to watch

Nothing specific is being tracked yet.

Source trail

Public sources opened for this story

No public sources are attached yet.

Odds chart

Candidate probability over time

Living timeline

Significant updates

  1. Coverage updated

    Observed movement

    Observed probability fell from 70.05% to 66.5% (-3.55 percentage points), from 2026-10-20T17:17:53.815Z to 2026-10-20T17:31:56.258Z (UTC).

    Editorial research is deferred. This update preserves the observed market change. The cause of the move is not established.

    The measured move

    Yes: 70.05% → 66.5%

    What changed

    Probability moved from 70.05% to 66.5% (-3.55 percentage points). Observations were 14 minutes 2 seconds apart: 2026-10-20 17:17:53 UTC to 2026-10-20 17:31:56 UTC.

    What to watch next

    Watch further market observations and reporting about this contract. This update has not been enrolled for editorial research.

    Sources

    No external sources are attached yet.

  2. Coverage updated

    Observed movement

    Observed probability fell from 69.6% to 66.5% (-3.1 percentage points), from 2026-10-20T13:46:59.633Z to 2026-10-20T14:00:04.954Z (UTC).

  3. Coverage updated

    Observed movement

    Observed probability fell from 70.5% to 66.4% (-4.1 percentage points), from 2026-10-20T12:01:26.940Z to 2026-10-20T12:17:29.644Z (UTC).

  4. Coverage updated

    Observed movement

    Observed probability rose from 24.65% to 28.8% (+4.15 percentage points), from 2026-10-19T13:00:29.070Z to 2026-10-19T13:31:28.002Z (UTC).

  5. Coverage updated

    Observed movement

    Observed probability rose from 62.05% to 68.15% (+6.1 percentage points), from 2026-10-19T12:32:54.459Z to 2026-10-19T13:00:29.070Z (UTC).

  6. Coverage updated

    Observed movement

    Observed probability fell from 38.85% to 24.65% (-14.2 percentage points), from 2026-10-19T12:32:54.459Z to 2026-10-19T13:00:29.070Z (UTC).

Market rules, made readable

Official description

How this market is decided

Read the rules before reading the headline. Resolution wording decides the outcome, not the news.

See what is changing

This market will resolve to the percentage change in the Japanese Consumer Price Index excluding fresh food (All items less fresh food, change from the previous year (%)) between 2025 and 2026 according to the Consumer Price Index Annual Report by the Statistics Bureau of Japan (SBJ).

The resolution source for this market will be the SBJ Consumer Price Index Annual Report released for 2026 (, currently scheduled to be released on January 22, 2027. Resolution of this market will take place upon release of the aforementioned data.

Read the complete resolution rules

Note: the resolution source for this market will be the official SBJ Consumer Price Index Annual Report, which reports percentage change in the Consumer Price Index over 12-month periods to only one decimal point (e.g., 2.8%). Thus, this is the level of precision that will be used when resolving the market.

For the avoidance of doubt, this market resolves on the core CPI figure — the all items index excluding fresh food — not the headline all items CPI figure. If the SBJ does not release the relevant figures on the scheduled date, this market may remain open up until March 31, 2027. If the information is not released by that time, this market will resolve to the lowest bracket.

Maps and resolution sources

Living timeline · 6 significant updates

Will Japan's core CPI increase by between 2.0 and 2.4% in 2026? — probability falls to 66.5%

Keep exploring

PolySays is independent and is not affiliated with, endorsed by, sponsored by, or operated by Polymarket. PolySays provides informational and educational content only and does not provide financial, betting, investment, tax, or legal advice. Prediction markets involve risk, and regulatory status varies by jurisdiction.

Source market

Prices come from Polymarket

Figures refresh periodically, not tick by tick. PolySays explains markets; it doesn’t run one or give trading advice.

View on Polymarket

PolySays may earn referral rewards from Polymarket links at no added cost to you. Full disclosure.