Japan is intensifying diplomatic engagement with Tehran following the detention and release of a Japanese national.

Calibration

MEDIUM tier, this pattern is present in calibration data but with limited resolutions. Treat the confidence as a directional estimate, not a precise probability.

Patterns of this shape resolved 5 YES of 17 historical Polymarket markets that share at least one of this claim's entities (12 NO, 29% YES rate).

Entities

• Tehran (place) gravity 0.0533 · momentum +0.088 · Q3616
• Japan (place) gravity 0.0023 · momentum -0.019 · Q17

Signals

• factor 18.08
• window_days 30
• edge_weight_prior 2.5
• edge_weight_recent 45.2
• event_count_recent 60

Confidence (55%) is computed numerically from these signals. The sentence prose was written by an LLM given only the structured signals as input, the LLM never sees or chooses the confidence number.

What would change our mind

Edge weight between Tehran and Japan returns to its 30-day baseline, or two clean weeks pass with no fresh co-mention from a tier-1 source.

Inversion conditions are a property of the pattern detector, not the LLM. Watch for this signal move and the claim should weaken or be superseded.

Where the contributing events happen

Contributing events (14)

• 2026-04-07 14:45:00 · gdelt · 138 Threaten with military force · tone -1.72
  Update1 trump renews criticism of japan s. korea for not helping u.s. in iran war
  Donald Trump · Iran · Japan · Tehran
  source ↗
• 2026-04-07 09:15:00 · gdelt · 010 Make public statement · tone -4.34
  Japanese detained in iran believed to be journalist released on bail
  Iran · Japan · Tehran
  source ↗
• 2026-04-07 08:00:00 · gdelt · 010 Make public statement · tone -4.00
  Japanese national held in iran released on bail
  Iran · Japan · Tehran
  source ↗
• 2026-04-07 07:30:00 · gdelt · 0841 Return, release person(s) · tone -0.40
  Japanese freed in iran not allowed to leave country
  Iran · Japan · Tehran
  source ↗
• 2026-04-07 07:00:00 · gdelt · 0841 Return, release person(s) · tone -0.40
  Japanese freed in iran not allowed to leave country report
  Iran · Japan · Tehran
  source ↗
• 2026-04-07 06:00:00 · gdelt · 0841 Return, release person(s) · tone -4.40
  5259548 japanese national detained iran january released bail
  Iran · Japan · Tehran
  source ↗
• 2026-04-07 04:15:00 · gdelt · 0253 Appeal to yield · tone -3.85
  Tokyo confirms japanese national held by iran freed 2
  Iran · Japan · Tehran · Tokyo
  source ↗
• 2026-04-07 04:00:00 · gdelt · 026 Appeal · tone +0.00
  Japans sanae takaichi seeking talks with irans president trump
  Donald Trump · Iran · Japan · Tehran
  source ↗
• 2026-04-07 03:45:00 · gdelt · 084 Return, release · tone -2.53
  Japan confirms release second citizen held iran
  Iran · Japan · Tehran
  source ↗
• 2026-04-07 03:30:00 · gdelt · 1056 Demand mediation · tone -2.22
  Trump renews criticism of japan's korea over iran war support
  Donald Trump · Iran · Japan · Tehran
  source ↗
• 2026-04-07 03:15:00 · gdelt · 014 Consider policy option · tone -1.92
  Trump renews criticism of japan south korea for not helping us in iran war
  Donald Trump · Iran · Japan · South Korea · Tehran
  source ↗
• 2026-04-07 02:45:00 · gdelt · 010 Make public statement · tone +1.58
  Japan pm says call with iranian president being arranged
  Iran · Japan · Tehran
  source ↗
• 2026-04-07 02:30:00 · gdelt · 173 Arrest, detain, or charge with legal action · tone -0.57
  Tokyo confirms japanese national held iran freed
  Iran · Japan · Tehran · Tokyo
  source ↗
• 2026-04-07 02:30:00 · gdelt · 084 Return, release · tone -0.56
  Tokyo confirms japanese national held
  Iran · Japan · Tehran · Tokyo
  source ↗

Confidence history