Japan imports over 90% of its oil through the Strait of Hormuz. Iran shut that strait six weeks ago. Now Japanese Prime Minister Sanae Takaichi is attempting what her predecessor Shinzo Abe tried and failed to do in 2019: talk Tehran down from the brink, this time with far higher stakes and a ticking clock set by Washington.
Takaichi announced on April 6 that Japan is arranging leadership-level talks with Iran — the first direct contact since the United States and Israel launched Operation Epic Fury on February 28, killing Supreme Leader Ali Khamenei and triggering Iran's closure of the world's most critical oil chokepoint. President Trump has given Iran until Tuesday to reopen the strait or face strikes on its power plants and bridges. Japan's intervention is a rare independent diplomatic move by Tokyo, driven by existential energy vulnerability and the calculation that neither Washington nor Tehran has a clear path to de-escalation without outside help.
Why it matters
If the Strait of Hormuz stays closed, one-fifth of the world's oil supply remains bottlenecked, driving global energy prices and inflation higher for months.
14 events
Latest: April 6th, 2026 · 1 month ago
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April 2026
Japan announces summit talks with Iran
LatestDiplomacy
Prime Minister Takaichi told parliament that Japan is arranging leadership-level talks with Iran — the first direct contact since the war began — and plans a separate call with Trump before the Tuesday deadline.
Trump sets 48-hour ultimatum on Hormuz
Escalation
Trump threatened to bomb Iranian power plants and bridges if the strait is not reopened by Tuesday, April 7. Iran rejected a temporary ceasefire proposal the same day.
Iran's Pezeshkian publishes open letter to Americans
Diplomacy
The Iranian president asked whether the war truly served 'America First,' signaling continued willingness to negotiate while seeking to build American public pressure for de-escalation.
March 2026
Trump extends strike pause to April 6
Diplomacy
The president cited progress in negotiations as the reason for a further extension.
Trump postpones strikes on Iranian power plants
Diplomacy
Citing 'major points of agreement,' Trump delayed planned strikes for five days — the first of several deadline extensions.
Takaichi meets Trump at Washington summit
Diplomacy
Japan joined five other nations in condemning Iran's strait closure. Takaichi and Trump agreed on expanded security cooperation including missile co-development.
Japan begins releasing strategic oil reserves
Economic
Tokyo authorized the release of 80 million barrels — roughly 45 days of domestic demand — as the strait closure choked Japan's energy supply.
UN Security Council condemns Iran's attacks on Gulf neighbors
Diplomacy
Resolution 2817 passed 13-0 with China and Russia abstaining, condemning Iran's strikes and reaffirming freedom of navigation through the strait.
Mojtaba Khamenei named new Supreme Leader
Political
The Assembly of Experts named the slain leader's son as successor under reported IRGC pressure. He vowed revenge and pledged to maintain the strait closure.
Iran retaliates and closes the Strait of Hormuz
Military
Iran launched hundreds of drones and ballistic missiles at Israel and US bases across the Gulf. The IRGC issued VHF warnings that no ships would be permitted through the Strait of Hormuz.
February 2026
US and Israel launch Operation Epic Fury
Military
Nearly 900 airstrikes hit Iran in 12 hours, targeting military infrastructure and leadership. Supreme Leader Ali Khamenei was killed in the strikes.
US and Iran hold indirect nuclear talks in Oman
Diplomacy
The two sides engaged in indirect negotiations in Muscat, with Iran's foreign minister later saying a 'historic' agreement was 'within reach.'
January 2026
Iran's regime crushes protests with mass killings
Escalation
The IRGC and Basij used live ammunition and drones against civilians. Death toll estimates range from 7,000 to over 36,000.
December 2025
Massive protests erupt across Iran
Unrest
The largest anti-government protests since the 2022 Mahsa Amini uprising broke out amid economic crisis, currency depreciation, and shortages.
Historical Context
3 moments from history that rhyme with this story — and how they unfolded.
1 of 3
June 2019
Abe's Iran mediation attempt (2019)
Japanese Prime Minister Shinzo Abe became the first sitting Japanese leader to visit post-revolutionary Iran, meeting both Supreme Leader Ali Khamenei and President Hassan Rouhani in Tehran. He carried a message from Trump and proposed a secret US-Iran summit in Tokyo. Khamenei told Abe he did not consider Trump 'worthy of exchanging messages with.' During the visit, a tanker was attacked in the Gulf of Oman, further undermining the effort.
Then
The mediation produced no breakthrough. The proposed Tokyo summit never materialized, and US-Iran tensions continued to escalate through the end of 2019.
Now
The failure established a cautionary precedent for Japanese Middle East diplomacy but also demonstrated Tokyo's willingness to act independently on issues affecting its energy security.
Why this matters now
Takaichi's initiative directly echoes her mentor Abe's approach, but under far more extreme conditions — an active war rather than diplomatic tensions, and with Japan's oil supply already disrupted rather than merely threatened.
2 of 3
1980-1988
Japan's shuttle diplomacy during the Iran-Iraq War (1980s)
During the eight-year Iran-Iraq War, Japan conducted shuttle diplomacy between Tehran and Baghdad to protect its oil imports through the Persian Gulf. This was one of the rare instances of independent Japanese diplomatic initiative during the Cold War, driven by the same vulnerability: near-total dependence on Gulf oil.
Then
Japan maintained its oil supply lines and earned goodwill from an internationally isolated Iran.
Now
The episode established Japan's credibility as a non-threatening interlocutor with Tehran — a diplomatic asset Tokyo is now attempting to leverage again nearly four decades later.
Why this matters now
Japan's current mediation draws on the same structural logic: Tokyo has no territorial ambitions in the Middle East, no history of military intervention there, and a powerful economic incentive to keep the strait open — making it one of the few US allies Iran might talk to.
3 of 3
1987-1988
The Tanker War and Operation Earnest Will (1987-1988)
During the Iran-Iraq War, both sides attacked oil tankers in the Persian Gulf, threatening global oil supplies. The US reflagged Kuwaiti tankers under the American flag and launched Operation Earnest Will to escort them through the strait. Iran laid mines and attacked shipping; the US destroyed Iranian oil platforms and naval vessels in Operation Praying Mantis, the largest US naval engagement since World War II.
Then
The US successfully kept the strait open through military force, but at the cost of direct naval combat with Iran and the accidental downing of Iran Air Flight 655, killing 290 civilians.
Now
The episode established the US military doctrine that the Strait of Hormuz must remain open at all costs — a precedent that directly informs Trump's current ultimatums.
Why this matters now
The 1988 precedent shows that the US has used force to keep Hormuz open before, but also that military solutions carry enormous risks of escalation and civilian casualties — exactly the dynamic Japan is trying to defuse through diplomacy.
