Osaka Titanium's ¥22bn Bet Against Russian Metal

Terra Drone's Terra B1 interceptor drone was the only design to pass Japan's Defense Equipment Agency demonstration test under the Interceptor Drone Early Acquisition Program, clearing a field that started at 38 proposals and narrowed to four finalists.

Why it matters: The pass moves the design into the agency's mass-production stage, positioning Terra Drone as the sole known supplier for a counter-drone capability Japan is building against Shahed-type kamikaze UAVs.

The catch: Terra Drone says it's still assessing what the contract does to earnings for the year through January 2027 — the size of the payoff hasn't been disclosed.

Japan's environment ministry has drafted numeric thresholds deciding whether a thermal, geothermal or wind plant rebuilt on its existing site gets a lighter environmental review or must restart the process as a brand-new project.

What changed: The draft cabinet order, open for public comment from August 25 through September 23, 2026, sets a distance limit of 300 metres and a capacity-growth ratio for a rebuild to qualify as a lighter-review project, implementing a 2025 revision to the Environmental Impact Assessment Act that created a distinct "rebuilding projects" category.

Why it matters: Utilities and independent power producers planning to modernize aging thermal and geothermal plants now have a concrete yardstick for how much they can expand a site before triggering a full environmental review, a real cost and timeline variable for repowering decisions across Japan's aging fleet.

Hitachi has sold its entire remaining stake in Hitachi Construction Machinery, a position that stood at 10.1% of voting rights, or 214,623 units, the day before the sale.

What changed: SMBC Nikko Securities placed the full stake with institutional investors in a single day on August 19, 2026, taking Hitachi's holding in the excavator and dump-truck maker to zero.

Why it matters: The sale finishes an equity unwind between the two companies that has run for years, expanding Hitachi Construction Machinery's public float even as the excavator maker says its engineering partnership with its former parent continues unchanged.

Mercari has finished the ¥10bn share buyback its board authorized on August 5, hitting its spending cap early rather than exhausting its share allowance.

What changed: Between August 6 and August 24, the online flea-market operator bought back 2,118,800 common shares on the Tokyo Stock Exchange, spending ¥9.99bn, and will cancel all of those shares on November 12.

Why it matters: Hitting the yen ceiling well before using up the full 4-million-share allowance shows Mercari's stock traded firm enough during the window that fewer shares bought more value, a modestly bullish signal for a company whose buyback size still equals only about 1.3% of shares outstanding.

ACSL priced 4,180,000 new shares at ¥1,310 apiece, a 9.97% discount to the day's ¥1,455 benchmark, to fund defense-drone production capacity.

What changed: The Tokyo Growth-market drone maker finalized terms for an overseas share sale its board approved a day earlier, with proceeds set for a defense-focused expansion running from September 2026 through December 2029.

Why it matters: A near-10% discount to raise growth capital tells investors ACSL needed the deal done quickly more than it needed to protect existing shareholders from dilution, a trade-off common among smaller defense suppliers racing to scale production.

Resonac Holdings' board resolved to spin off its wholly owned petrochemicals subsidiary by distributing shares directly to its own shareholders on a one-for-one basis, a dividend-in-kind booked at ¥37.8bn in book value, rather than selling the unit.

Why it matters: The distribution, set for October 1 pending Tokyo Stock Exchange approval of the subsidiary's listing, drops Resonac's stake below 20% and removes the petrochemicals business from its consolidated results.

Tokio Marine will split each share of its common stock 15-for-1 on October 1, 2026, lifting its outstanding share count from 1.934 billion to 29.01 billion shares.

What changed: The insurer is raising its authorized share ceiling from 8 billion to 100 billion shares to make room for the split, adding a shareholder perk that only pays out after three years of continuous holding, and lifting its buyback share-count limit from 130 million to 1.95 billion shares while keeping the ¥200bn spending cap unchanged.

Why it matters: The split cuts the per-share price to widen retail access, but the three-year holding requirement for the new perk means the reward goes to patient shareholders, not the traders the lower ticket price might attract.

Cerespo, the Tokyo-listed event-services operator, faces a ¥4.1bn lawsuit from the liquidating Tokyo Olympic and Paralympic Games organising committee over a contractual penalty clause tied to a Japan Fair Trade Commission antitrust order.

What changed: The organising committee filed the case at the Tokyo District Court on May 28, 2026, and Cerespo says the complaint reached it on July 31, 2026, triggered by JFTC cease-and-desist orders and Antimonopoly Act findings tied to how the company executed its Games-era contracts.

Why it matters: ¥4.1bn is a material sum for a company Cerespo's size, and the case shows Olympic-era antitrust findings can still generate large financial claims years after the Games ended, with the liquidating organising committee actively pursuing contractual penalties rather than writing off the exposure.