Skip to content

Weekday Japan business intelligence for finance professionals.

Join the list
Tokyo Brief東 京 ブ リ ー フJapan's day, wrapped and delivered by morning.
← Tools
Tools · FilingsUpdated with new filings

Japan Activist & 5% Ownership Stakes

Disclosed stakes above 5%, with activist groups and ownership changes.

Data through · Updated with new filings

0

new stakes above 5% filed in the past week

The largest move was 3Dインベストメント・パートナーズ・プライベート・リミティッド in MediciNova, −1.34 pp.

1 row matches “4875” · Clear · Go to MediciNova (4875) →

Data coverage and sources

Shows 1 of 1 filings.

Curated engagement groups match legal filer codes. Affiliated filers count once per issuer, using the largest disclosed stake. A filing does not imply an active campaign.

Dates select original filings, with retained later corrections applied.

CSV contains accepted filings in this selection, including original text and separate English display fields. Source ratios and percent fields retain their own units.

English prose ready for 1 / 1 filings. Unverified names use source identities; originals remain available.

Displayed filings since 2 Oct 2026

Latest disclosed stakes within the selected filing window; this is not a complete ownership book. Filed changes can lag trades. A stake is the holding ratio as filed under the large-shareholding rules and includes potential shares underlying instruments such as warrants.

This week's 5% crossings

0

No stored data for this selection.

Largest moves

1
Largest moves
CompanyHolderStakeChangePurposeFiling
MediciNova4875 · メディシノバ・インク3Dインベストメント・パートナーズ・プライベート・リミティッド9.88%−1.34 ppPure investmentPure investment
Original (Japanese)純投資
Filed  — filing S100Z626

Activist league

1
Activist league
HolderPositionsNet new in selection
3D Investment Partners / Hibiki10

Crowded names

0

No stored data for this selection.

Exits below 5%

0

No stored data for this selection.

All tools →