Japan came to the G7 summit in Kananaskis with two separate but related goals: building new energy partnerships across Asia, and quietly formalizing a harder stance toward China in its official policy documents.

Energy Security as Diplomatic Tool

In one-on-one meetings during the summit, Prime Minister Sanae Takaichi spoke with the leaders of the UK and Italy about Japan's energy agenda. With the UK, she promoted POWERR Asia — a framework Japan is developing to help Indo-Pacific countries coordinate their energy supplies and protect themselves against disruptions. The next day, she met with Italy's leader and pressed for concrete G7 commitments on energy resilience, not just statements in official communiqués.

POWERR Asia isn't well known yet in global energy circles, but Tokyo's choice of countries was deliberate. Both Britain and Italy import most of their energy and depend heavily on liquefied natural gas (LNG). Both also have active diplomatic interests in the Indo-Pacific. By pitching the framework to them first, Japan is building support before bringing it to the larger G7 table — a standard Japanese approach designed to avoid conflict during big multilateral meetings.

There's also a domestic reason for this energy push. Japan itself struggled after the Fukushima nuclear disaster in 2011, when public concern about nuclear safety grew and the country became more dependent on importing fuel. By proposing a regional energy framework, Tokyo can take a leadership role without having to resolve its own energy debates first.

The Shift on China

Something more fundamental is also happening. Next month, Japan's Foreign Ministry is expected to release its 2026 Diplomatic Bluebook — an official document that guides how the government talks about its relationships with other countries and signals priorities to Japanese businesses and diplomats. When it does, that document will stop calling China Japan's "most important" bilateral relationship, a phrase Tokyo has used for years according to Reuters.

The Bluebook isn't a law or a binding policy, but it matters. It tells government agencies, corporations, and other countries how Tokyo officially sees the world. Removing that phrase is a public downgrade of the relationship's importance.

This didn't happen in isolation. In late 2025, Prime Minister Takaichi made public comments about Taiwan that angered Beijing. China responded by stopping the release of Japanese films — a deliberate choice since Japanese movies are popular in China — and Japan issued travel warnings urging its citizens in China to avoid crowds and take extra precautions. That kind of warning is usually reserved for war zones or serious civil unrest, and it sent a clear message about how tense things had become.

The Bluebook change makes official what that crisis revealed. For years, Tokyo kept calling China "most important" even as military tensions grew over disputed islands called the Senkaku (in Japanese) or Diaoyu (in Chinese), and even as Beijing used its economic power as a pressure tactic. Now Tokyo judges that keeping that language costs more than it gains.

Reading the Two Moves Together

The two tracks Japan is running — building new energy partnerships and formally downgrading China's status — create a complicated situation. Tokyo is trying to expand energy cooperation across the Indo-Pacific, a region where many countries depend on China economically and fear being forced to choose sides.

The broader context here is worth considering. For other G7 members, Japan's Bluebook shift will look like alignment with a Western pattern: reviewing their reliance on China in supply chains, technology, and now in official diplomatic language. That convergence might lead to coordinated G7 strategy on China. Or each country might simply adjust its own position separately. The answer will become clearer in the weeks ahead.

The real test is whether Japan can present POWERR Asia as a genuine energy initiative that helps all partners, or whether countries will see it as a way to reduce China's power over regional energy — and whether Tokyo can answer both questions honestly with itself.