Who has been buying Mental Health Technologies Co.,Ltd. stock?

5 distinct investors have filed 8 disclosed large-shareholding filings in Mental Health Technologies Co.,Ltd. (9218), most recently on 2025-06-06. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does Mental Health Technologies Co.,Ltd. have?

Mental Health Technologies Co.,Ltd. has 8 buy-side and 15 sell-side disclosures on record, covering ¥2.1B ($13.5M) in total reported value, spanning 2022-03-31 to 2025-06-06.

Where does StockDrifts get Mental Health Technologies Co.,Ltd. insider data?

From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.

Do insider buys in Japanese stocks predict returns?

Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

Mental Health Technologies Co.,Ltd. 9218

Company

株式会社メンタルヘルステクノロジーズMental Health Technologies Co.,Ltd.

Investors

Buys

Total Value

¥2.1B ($13.5M)

Avg Return

-33.09%

Last Filing

2025-06-06

Mental Health Technologies Co.,Ltd. (9218) has 8 disclosed large-shareholding filings and 15 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥2.1B ($13.5M) in reported transaction value. The earliest filing StockDrifts holds for Mental Health Technologies Co.,Ltd. is dated 2022-03-31; the most recent is 2025-06-06. All of it is parsed from EDINET large-shareholding (5%+) reports, the official disclosure system operated by the Financial Services Agency (Japan). Across these filings the average return since disclosure is -33.09%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2025-06-06	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	393.5K	¥660	-15.2%	¥92M ($596K)
2024-08-23	SELL	unknown	STONE株式会社 STONE Co., Ltd.	strategic	30.0K	¥864	+12.0%	¥89M ($575K)
2024-08-23	BUY	unknown	刀禰真之介 Shinnosuke Tone	activist	3.9M	¥864	-12.0%	¥3.4B ($21.7M)
2024-05-09	BUY	unknown	STONE株式会社 STONE Co., Ltd.	strategic	30.0K	¥833	-8.8%	¥25M ($161K)
2024-05-09	SELL	unknown	刀禰真之介 Shinnosuke Tone	activist	3.9M	¥833	+8.8%	¥3M ($16K)
2023-08-30	SELL	unknown	刀禰真之介 Shinnosuke Tone	activist	3.9M	¥859	+11.5%	¥20M ($129K)
2023-08-30	SELL	unknown	STONE株式会社 STONE Co., Ltd.	strategic	30.0K	¥859	+11.5%	¥87M ($560K)
2023-08-30	SELL	unknown	STONE株式会社 STONE Co., Ltd.	strategic	30.0K	¥859	+11.5%	¥87M ($560K)
2023-08-30	SELL	unknown	刀禰真之介 Shinnosuke Tone	activist	3.9M	¥859	+11.5%	¥20M ($129K)
2023-08-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	509.3K	¥758	+0.3%	¥386M ($2.5M)
2023-06-07	SELL	Market Buy	エーシージー・マネージメント・プライベート・リミテッド(ACG Management Pte. Ltd.) ACG Management Pte. Ltd.	passive	480.7K	¥1,082	+29.8%	¥132M ($850K)
2023-04-19	SELL	Market Buy	株式会社ファストトラックイニシアティブ Fast Track Initiative, Inc.	passive	316.0K	¥1,047	+27.4%	¥267M ($1.7M)
2023-02-10	SELL	Market Buy	株式会社ファストトラックイニシアティブ Fast Track Initiative, Inc.	passive	567.5K	¥1,392	+45.4%	¥140M ($901K)
2023-02-03	SELL	Market Buy	株式会社ファストトラックイニシアティブ Fast Track Initiative, Inc.	passive	667.5K	¥1,409	+46.1%	¥166M ($1.1M)
2023-02-03	BUY	Market Buy	株式会社ファストトラックイニシアティブ Fast Track Initiative, Inc.	passive	667.5K	¥1,409	-46.1%	¥166M ($1.1M)
2023-01-11	SELL	Market Buy	エーシージー・マネージメント・プライベート・リミテッド(ACG Management Pte. Ltd.) ACG Management Pte. Ltd.	passive	598.2K	¥1,126	+32.5%	¥147M ($950K)
2022-12-01	BUY	unknown	STONE株式会社 STONE Co., Ltd.	strategic	30.0K	¥1,817	-58.2%	¥55M ($352K)
2022-12-01	SELL	unknown	刀禰真之介 Shinnosuke Tone	activist	3.9M	¥1,817	+58.2%	¥2M ($12K)
2022-10-31	BUY	Market Buy	STONE株式会社 STONE Co., Ltd.	strategic	30.0K	¥1,689	-55.0%	¥51M ($327K)
2022-10-31	BUY	unknown	STONE株式会社 STONE Co., Ltd.	strategic	30.0K	¥1,689	-55.0%	¥51M ($327K)
2022-10-31	BUY	Market Buy	刀禰真之介 Shinnosuke Tone	activist	3.9M	¥1,689	-55.0%	¥88M ($568K)
2022-10-31	BUY	unknown	刀禰真之介 Shinnosuke Tone	activist	3.9M	¥1,689	-55.0%	¥88M ($568K)
2022-10-21	BUY	Market Buy	エーシージー・マネージメント・プライベート・リミテッド(ACG Management Pte. Ltd.) ACG Management Pte. Ltd.	passive	728.2K	¥1,512	-49.7%	¥156M ($1.0M)
2022-10-21	BUY	Market Buy	エーシージー・マネージメント・プライベート・リミテッド(ACG Management Pte. Ltd.) ACG Management Pte. Ltd.	passive	728.2K	¥1,512	-49.7%	¥156M ($1.0M)
2022-10-19	SELL	Market Buy	株式会社ファストトラックイニシアティブ Fast Track Initiative, Inc.	passive	786.1K	¥1,449	+47.5%	¥144M ($928K)
2022-10-19	BUY	Market Buy	株式会社ファストトラックイニシアティブ Fast Track Initiative, Inc.	passive	786.1K	¥1,449	-47.5%	¥144M ($928K)
2022-10-07	BUY	Market Buy	エーシージー・マネージメント・プライベート・リミテッド(ACG Management Pte. Ltd.) ACG Management Pte. Ltd.	passive	625.5K	¥1,459	-47.9%	¥913M ($5.9M)
2022-10-05	SELL	Market Buy	株式会社ファストトラックイニシアティブ Fast Track Initiative, Inc.	passive	885.3K	¥1,435	+47.0%	¥834M ($5.4M)
2022-10-05	BUY	Market Buy	株式会社ファストトラックイニシアティブ Fast Track Initiative, Inc.	passive	885.3K	¥1,435	-47.0%	¥834M ($5.4M)
2022-10-05	BUY	Market Buy	株式会社ファストトラックイニシアティブ Fast Track Initiative, Inc.	passive	885.3K	¥1,435	-47.0%	¥834M ($5.4M)
2022-04-04	BUY	Market Buy	株式会社ファストトラックイニシアティブ Fast Track Initiative, Inc.	passive	1.4M	¥939	-19.1%	¥1.3B ($8.7M)
2022-03-31	BUY	unknown	STONE株式会社 STONE Co., Ltd.	strategic	30.0K	¥940	-19.1%	¥28M ($182K)
2022-03-31	BUY	unknown	刀禰真之介 Shinnosuke Tone	activist	3.7M	¥940	-19.1%	¥3.5B ($22.3M)

Frequently asked questions

Who has been buying Mental Health Technologies Co.,Ltd. stock?: 5 distinct investors have filed 8 disclosed large-shareholding filings in Mental Health Technologies Co.,Ltd. (9218), most recently on 2025-06-06. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does Mental Health Technologies Co.,Ltd. have?: Mental Health Technologies Co.,Ltd. has 8 buy-side and 15 sell-side disclosures on record, covering ¥2.1B ($13.5M) in total reported value, spanning 2022-03-31 to 2025-06-06.
Where does StockDrifts get Mental Health Technologies Co.,Ltd. insider data?: From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.
Do insider buys in Japanese stocks predict returns?: Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

Source filings

Every trade listed above is disclosed in EDINET large-shareholding (5%+) reports, filed with the Financial Services Agency (Japan). View the original EDINET filings for Mental Health Technologies Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.