Market Overview
Japanese equities delivered a sharply bifurcated session on July 31, 2026, with technology and nonferrous metal stocks powering ahead while automobiles, pharmaceuticals, and real estate came under heavy selling pressure. The day’s dominant macro backdrop was the Bank of Japan’s decision to hold its policy rate steady at around 1%, even as the yen strengthened rapidly — fuelling speculation of fresh government and central bank intervention in currency markets. The divergence between surging semiconductor-linked names and battered defensive and consumer sectors underscored a market navigating significant cross-currents.
Top Gainers
The session’s most spectacular moves were concentrated in the semiconductor supply chain and electronics space, with several names posting gains rarely seen in a single trading day.
- IBIDEN CO LTD (4062): +21.98% — The IC substrate specialist led all Nikkei 225 constituents, surging on what appeared to be a powerful re-rating of advanced packaging names amid broader enthusiasm for AI infrastructure plays.
- PANASONIC HOLDINGS CORP (6752): +19.53% — A remarkable single-session jump for the diversified electronics giant, suggesting a significant positive catalyst, potentially linked to restructuring progress or a partnership announcement.
- SUMCO CORPORATION (3436): +17.52% and TAIYO YUDEN CO LTD (6976): +17.22% — Silicon wafer and electronic components makers rallied sharply alongside the broader semiconductor supply chain. A reported Kumamoto earthquake disruption to factory operations may paradoxically have tightened supply expectations for specialist manufacturers less affected by the event.
- ADVANTEST CORP (6857): +16.34% and MURATA MANUFACTURING CO (6981): +15.59% — Semiconductor test equipment and components leaders continued to attract strong buying interest, reinforcing the day’s clear thematic winner.
- SOFTBANK GROUP CORP (9984): +13.80% — The technology investment conglomerate recovered sharply, benefiting from the broader AI and tech sentiment sweeping through the market.
Top Decliners
While technology soared, several sectors faced meaningful headwinds.
- NOMURA RESEARCH INSTITUTE (4307): -15.96% — The IT services and consulting firm was the day’s steepest faller among blue chips, a notable reversal for a stock typically regarded as a defensive quality holding.
- KONICA MINOLTA INC (4902): -14.48% — Continued structural pressures in legacy imaging and document businesses weighed heavily.
- AISIN CORPORATION (7259): -11.71% and DENSO CORP (6902): -10.47% — Auto parts suppliers fell sharply in tandem with the broader Transportation Equipment and Automobiles sectors, as rapid yen appreciation raised concerns over export competitiveness and margin pressure.
- DAIICHI SANKYO COMPANY LIMITED (4568): -11.13% — The pharmaceutical bellwether dropped sharply as the sector broadly underperformed, declining over 4% on average.
Sector Snapshot
Nonferrous Metals was the runaway sector leader, surging nearly 10% on average — driven by SUMCO, MITSUI KINZOKU, and FURUKAWA ELECTRIC. Electrical Equipment followed with a gain of over 5%, powered by the semiconductor supply chain rally. Shipbuilding and Machinery also held positive ground.
On the losing side, Automobiles (-3.31%), Transportation Equipment (-2.92%), and Real Estate (-3.43%) bore the brunt of yen strength and risk-off rotation. Pharmaceuticals was the single worst-performing sector at -4.17%, while Services (-3.74%) and Railways & Buses (-3.11%) also struggled. The BOJ’s rate hold, combined with apparent currency intervention, created an environment where export-sensitive manufacturers faced a sharp recalibration of earnings expectations.
Source: Tokyo Stock Exchange data | Japan Economic News