Nikkei 70,000 Isn't a Broad Rally — It's a Sector Selection Test

Japan’s Nikkei brushed ¥70,000 intraday this month — the fastest run to that level in the index’s history. The instinctive read is “weak yen, export boom, Japan Inc. wins.” Our analysis of 30 years of BOJ and FX data already showed the yen-defense logic behind the BOJ’s rate hike doesn’t hold up. The export-boom side of the story doesn’t hold up uniformly either — it depends entirely on which sector you’re looking at.

The mechanism that used to make “weak yen = broad export win” true has narrowed. Japan’s manufacturing overseas production ratio now stands at 27.2% on average, and the gap between sectors is the whole story:

A lower overseas production ratio means more of a company’s output is still made in Japan and sold abroad — the classic channel through which a weaker yen becomes a real competitive advantage rather than just an accounting translation. That ratio alone sorts most of the confusion below into place.

The Real Winners: Narrow and Concentrated

Semiconductor equipment is the cleanest case. Japan holds 32% of the global semicon equipment market, the sector’s overseas production ratio is the lowest of any manufacturing category, and global equipment investment is growing roughly 7.4% a year through 2030 — over 70% of it in Asia. This is structural growth plus a real weak-yen tailwind, not one masking the other. We’ve covered specific names in this space (TOWA, Samco) — the sector-level data confirms it isn’t a coincidence.

Shipbuilding is the same mechanism at a much smaller scale. Japan’s domestic production ratio is roughly 80%, with over 90% of components sourced domestically — about as close to “pure” export exposure as exists in Japanese manufacturing. The weak yen has genuinely revived order competitiveness, pushing FY2024 sector sales above ¥2tn. But Japan’s global shipbuilding share has collapsed to just 8%, against China’s 71% and Korea’s 14%. Tokyo is now funding a ¥120bn revival fund over three years, targeting a doubling of commercial output by 2035. This is a real beneficiary recovering from a near-wipeout, not a sector at full strength.

The Fragile Middle: Autos

Auto makers have enormous mechanical FX sensitivity — Toyota’s own disclosure puts a ¥1 move against the dollar at roughly ¥50bn in operating profit, Honda’s at ¥10bn. But two things dilute that into something much less clean. First, the sector’s 48.9% overseas production ratio means a large share of “yen benefit” is really overseas-subsidiary translation, not Japan-based export competitiveness. Second, Trump-administration tariffs are eating a comparable amount in the opposite direction — Toyota faces a reported ¥1.4tn annual tariff burden, Honda ¥450bn. In Q1 2024, Japan’s seven major automakers posted operating profit up 12% year-on-year — but stripping out the FX effect, profit was actually down. Nikkei’s own headline for the trend: the weak-yen effect is “peeling away.”

Where the Story Inverts: Electronics and Steel

Electronics majors are, somewhat counterintuitively, facing a yen headwind this fiscal year, not a tailwind — FY2026 guidance assumes ¥140–145/dollar against last year’s ¥153 average, a stronger-yen assumption that subtracts an estimated ¥305bn from Hitachi’s results and ¥190bn from Mitsubishi Electric’s, with tariffs adding further drag (Sony −¥100bn, Panasonic Holdings up to −¥78bn). The deeper issue predates this year’s FX math: Japan’s electronics industry lost its dominant position in TVs and consumer electronics to Korean, Chinese, and US rivals starting in the 1990s, and has been pivoting toward semiconductors, batteries, gaming, and systems ever since. The weak yen has little competitive base left to amplify.

Steel is a net loser from yen weakness, not a beneficiary. Iron ore and coking coal are dollar-denominated imports, so a weaker yen raises input costs faster than it helps export pricing — especially with raw material prices already elevated. Nippon Steel’s FY2026 guidance shows operating profit down 41.5% and net profit down 42.9%, though the dominant driver is Chinese oversupply flooding the market with cheap steel, not currency alone.

A Different Axis Entirely: Defense-Linked Heavy Industry

Mitsubishi Heavy, Kawasaki Heavy, and IHI are growing on order backlogs of ¥10.7tn, ¥2.7tn, and over ¥1.5tn respectively, driven by Japan’s expanding defense budget — Mitsubishi Heavy’s defense contract value alone runs ¥1.46tn. This has nothing to do with the yen. It’s a domestic fiscal-policy story, structurally similar to the policy-budget-dependent growth pattern we’ve flagged before in other names — durable as long as the defense budget keeps expanding, but a different risk entirely from currency exposure.

The Defensive Layer — With One Catch

Supermarkets, pharmaceuticals, utilities, rail, and telecom are the genuine FX-insulated holdings: supermarket sales are up a steady 1.5% year-on-year on staple food and beverage demand, and these sectors carry low currency sensitivity by design. Department stores look like they belong on this list but don’t quite — Japan’s department store sales fell 1.5% in 2025, the first annual decline since 2020, as inbound tourism growth plateaued and high prices weighed on domestic spending. The April 2026 rebound was driven specifically by duty-free sales. Department stores are, in practice, an inbound-tourism play wearing a domestic-retail costume — which means they’re still indirectly linked to the same weak yen that’s driving this whole scorecard, just through tourists’ wallets instead of trade invoices.

Is ¥70,000 Even Real, Once You Strip Out the Yen?

One more check before drawing conclusions: how much of the Nikkei’s run to ¥70,000 is genuine outperformance versus simply a weaker yen inflating a yen-denominated number? We converted the Nikkei into dollar terms and compared it against the Dow on a currency-neutral basis.

Over the full decade, most of the “Japan miracle” narrative is a currency illusion — in dollar terms, Japan actually trailed the Dow. But over the past two years specifically, USD/JPY has been roughly flat net-to-net (¥159.7 to ¥160.2), which strips the currency effect almost completely out of the comparison — and the Nikkei still beat the Dow by close to 40 points in that window. The recent leg of this rally is real, not a yen mirage, and it lines up with the timeframe in which semiconductor-equipment names have been doing most of the work.

The Takeaway

“Buy Japan because the yen is weak” was never a one-trade thesis, and at ¥70,000 on the Nikkei it’s an even worse one now. The sectors actually built to benefit — semiconductor equipment, and shipbuilding at a smaller scale — are a small fraction of what’s rallying, but the dollar-term math above suggests they’re carrying real weight, not just currency-inflated weight. Autos are riding a tariff-eroded translation effect on top of soft underlying profit, and electronics and steel face real headwinds dressed up in a weak-yen narrative that no longer applies to them — both look like candidates to trim from a “Japan re-rating” thesis rather than to lean into. Defense-linked heavy industry and shipbuilding sit on a different, currency-independent growth axis with genuinely longer runway — backed by a multi-year government budget and revival-fund commitment rather than an exchange rate. That doesn’t mean buy them blindly: both have already re-rated hard on this theme, and whether that’s still attractively priced is a question we haven’t answered here and will keep watching. At this index level, sector selection — and increasingly, valuation discipline within the sectors that are actually working — is doing more work than the exchange rate.

Source: METI Overseas Business Activity Survey | 日本語版

Disclaimer | This article is for informational purposes only and does not constitute investment advice.