Japan arrived at the G7 summit in Kananaskis carrying two distinct agendas: a constructive push on energy security through new multilateral frameworks, and a quietly hardening posture toward Beijing that is now being written into official foreign policy doctrine.

Energy Diplomacy at the Summit Table

In bilateral meetings on the summit's margins, Prime Minister Sanae Takaichi used the encounters with UK and Italian counterparts to advance Japan's energy security agenda in concrete terms. In the session with the UK, Takaichi promoted POWERR Asia — a framework Tokyo has been building to coordinate energy capacity and resilience across the Indo-Pacific. The following day, in a separate meeting with Italy, the conversation turned to collective G7 action on energy resilience, with Takaichi pressing for concrete steps rather than communiqué language.

POWERR Asia is not yet a household name in multilateral energy circles, but the bilateral platform choices are deliberate. Britain and Italy are both net energy importers with significant LNG exposure and active Indo-Pacific policy tracks. By tabling the framework with both, Tokyo is building a pre-consensus before any G7-wide discussion, a standard Japanese diplomatic sequencing that aims to reduce summit-floor friction.

The energy push also carries a domestic subtext. Japan's own energy mix remains constrained by post-Fukushima public wariness around nuclear and by high import dependency for fossil fuels. Exporting a regional resilience framework lets Tokyo play an architectural role without having to resolve its own energy transition debates first.

The China File

Running beneath the summit diplomacy is a more structurally significant shift. The Japanese government is expected to approve the 2026 Diplomatic Bluebook next month, and when it does, the document will no longer describe China as Japan's "most important" bilateral relationship — a phrase that has anchored Japan's China framing for years, according to Reuters. The Bluebook is not a policy instrument in itself, but it codifies the Gaimusho's working assumptions and signals to ministries, businesses, and foreign governments how Tokyo officially frames its priorities.

The downgrade did not emerge in a vacuum. Relations deteriorated sharply in late 2025 after Takaichi made public statements on Taiwan that Beijing found unacceptable. China responded by suspending Japanese film releases — a culturally loaded move given the popularity of Japanese cinema on the mainland — and the Japanese government issued safety advisories urging its citizens in China to avoid crowded places and heighten personal precautions. That kind of advisory, normally reserved for active conflict zones or acute civil unrest, carried an unmistakable signal about the temperature of the relationship at the time.

The Bluebook change formalizes what the diplomatic crisis made visible. For years, Tokyo calibrated its China language carefully, keeping the "most important" framing even as security tensions mounted over the Senkaku/Diaoyu islands, military activity in the East China Sea, and economic coercion concerns. Dropping it now reflects a judgment — across multiple LDP administrations, but accelerated under Takaichi — that the strategic cost of maintaining that framing has exceeded its diplomatic utility.

What the Two Tracks Tell Us

The juxtaposition at Kananaskis is instructive. Tokyo is simultaneously trying to build new energy architecture across the Indo-Pacific — a region that includes major economies with their own complex China dependencies — while formally downgrading how it characterizes its relationship with the region's largest power.

That is a difficult needle to thread. POWERR Asia's appeal to potential partners in Southeast Asia will partly depend on whether they read it as a genuine resilience initiative or as a security-adjacent framework designed to reduce China's leverage over regional energy flows. Tokyo will need to manage that perception gap carefully, particularly with ASEAN members that have resisted picking sides explicitly.

For G7 partners, the Bluebook change is likely to register as alignment with a broader Western trend of recalibrating China exposure — in supply chains, in technology, and now in diplomatic framing. Whether that convergence translates into coordinated G7 policy on China, or remains a set of parallel national posture shifts, is the open question heading out of Kananaskis.