Free Beta Now Available

Large shareholding reports,
delivered instantly
to your inbox.

We detect large shareholding reports filed on EDINET in real time. Get notified by email with who holds what stock and at what percentage.

* Email address only. No credit card required.

Inbox
NewπŸŽ‰ Large Shareholding Report - Jushin Bank (8395) 5.25%11:45
ChangeπŸ“ Large Shareholding Report - Vision (9416) 4.40%11:45
ChangeπŸ“ Large Shareholding Report - ADEKA (4401) 6.28%11:13
NewπŸŽ‰ Large Shareholding Report - Jonan Shingaku (4720) 6.03%10:41
ChangeπŸ“ Large Shareholding Report - Yamashin-Filter (6240) 8.82%10:41
πŸ› 

"I built it because I needed it myself."

As a Japanese stock investor, I always wanted a faster and clearer way to check large shareholding reports. Existing services didn't meet my needs, so I decided to build my own. I hope it helps fellow investors who feel the same way.

Problem

Struggling to keep up with
large shareholding reports?

⏳

Too slow to notice

By the time you manually check EDINET, the stock price may have already moved.

πŸ“„

PDFs are hard to read

The original PDF reports are dense and scattered, making it tedious to find key shareholding changes.

πŸ”

Existing tools fall short

RSS feeds and other notification services often lack the speed and detail investors need.

How It Works

Get started in 3 simple steps

1

Register your email

Just enter your email address. Takes less than a minute.

β†’
2

We monitor & analyze

EDINET filings are automatically parsed and analyzed.

β†’
3

Get notified by email

Well-organized report data is delivered straight to your inbox.

Notification Sample

Here's what you'll receive

New ReportLarge Shareholding Report
StockJushin Bank Co., Ltd. (8395)
HolderNomura Securities Co., Ltd.
Ownership5.25%
Changeβ€” (No prior data)
Shares held988,934
Report date2026-03-23
AmendmentChange Report
StockVision Inc. (9416)
HolderNomura International plc
Ownership4.40%
Change-0.80pt (vs. prior)
Shares held2,240,102
ReasonOwnership ratio decreased by 1% or more
AmendmentChange Report
StockSunday Co., Ltd. (7450)
HolderAsset Management One Co., Ltd.
Ownership100.00%
Change+3.6pt (vs. prior)
Shares held10,806,115
ReasonChange in holdings / material contract change
New ReportLarge Shareholding Report
StockJonan Shingaku Kenkyusha (4720)
HolderJonan Shingaku Kenkyusha Corp.
Ownership6.03%
Changeβ€” (No prior data)
Shares held538,608
Report date2026-03-23

Data sourced from EDINET (Financial Services Agency of Japan) under PDL1.0

Features

Why Martify?

Fastest notifications

Get email alerts as soon as new filings are detected on EDINET. Stay ahead of the market.

Clean, structured data

No need to open PDFs. Stock name, holder, ownership ratio, and changes are all in the email body.

Color-coded report types

Orange for new reports, green for amendments. Instantly tell them apart from the subject line.

Direct links to EDINET originals

Each email includes a link to the original PDF on EDINET for full details.

Built by an investor, for investors

Created by an indie developer who invests in Japanese stocks and uses this tool every day.

Beta Registration

Join the Free Beta

Currently available as a free beta.
Your feedback helps us improve the service.

Completely free Email only Cancel anytime
Open Registration Form

* Please ensure you can receive emails from @iloc.co.jp