Free until the end of next month

Large shareholding reports,
the same day
in your inbox.

Large shareholding reports filed on EDINET, delivered by email — roughly hourly during trading hours, plus a daily summary at 20:20 JST. See who holds what stock and at what percentage.

* Email only, no password. Free until the end of next month (no card required).

Inbox
🚨 ⭐5 Notable 🎯2 Concentrated — 12 New / 90 Amendments20:20
🚨 Large Shareholding Reports — 2 Amendments (↑1↓1)10:40
🚨 ⭐5 Notable 🎯1 Concentrated — 18 New / 78 Amendments20:20
🚨 ⭐3 Notable — 5 New / 25 Amendments20:20

Roughly hourly during trading hours, plus a summary of the day at 20:20 JST.

🛠

"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 many to follow daily

Dozens of reports are filed every business day. Even if you check EDINET regularly, you can't read all of them.

📄

PDFs are hard to read

The original PDF reports are dense and scattered, making it tedious to find who holds what and at what percentage.

🔍

Easy to miss, even when you look

Familiar names stand out, but a quiet line buried in the list does not. You notice the same name appearing again and again only afterwards.

How It Works

Get started in 3 simple steps

1

Sign up with email

Just open the login link we send. No password needed.

2

We monitor & analyze

EDINET filings are automatically parsed and analyzed.

3

Get notified by email

Roughly hourly during trading hours, plus a summary of the day at 20:20 JST.

Notification Sample

Here's what you'll receive

Sample daily digest email from Martify

* Sample of the daily summary sent at 20:20 JST

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

Features

Why Martify?

Intraday alerts and a daily summary

Roughly hourly during Japanese trading hours, plus every filing of the day summarised at 20:20 JST.

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.

Notable moves are flagged for you

Activist entries, large swings and repeated filings on the same stock are detected automatically and marked in the subject line with ⭐🚨🎯 — so you can tell which days are worth a closer look.

You choose how much you get

Intraday alerts and the daily summary can be switched on and off independently from your account page.

Built by an investor, for investors

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

Get Started

Free until the end of next month

Free until the end of the month after you register — you're never charged automatically when the trial ends.
Continue only if you want, for ¥1,280/month (tax incl.). It renews monthly after you subscribe, and you can cancel anytime.

Free until next month-end Email only Cancel anytime
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* Please ensure you can receive emails from @iloc.co.jp