Who has been buying Chuou International Group Co., Ltd. stock?

6 distinct investors have filed 16 disclosed large-shareholding filings in Chuou International Group Co., Ltd. (7170), most recently on 2025-07-23. 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 Chuou International Group Co., Ltd. have?

Chuou International Group Co., Ltd. has 16 buy-side and 6 sell-side disclosures on record, covering ¥180M ($1.2M) in total reported value, spanning 2021-03-30 to 2025-07-23.

Where does StockDrifts get Chuou International Group 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.

Chuou International Group Co., Ltd. 7170

Company

中央インターナショナルグループ株式会社Chuou International Group Co., Ltd.

Investors

Buys

Total Value

¥180M ($1.2M)

Avg Return

+25.06%

Last Filing

2025-07-23

Chuou International Group Co., Ltd. (7170) has 16 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥180M ($1.2M) in reported transaction value. The earliest filing StockDrifts holds for Chuou International Group Co., Ltd. is dated 2021-03-30; the most recent is 2025-07-23. 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 +25.06%, 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
2025-07-23	SELL	unknown	石井露 Tsuyoshi Ishii	strategic	254.9K	¥280	-7.1%	¥14M ($89K)
2025-07-23	SELL	unknown	石井露 Tsuyoshi Ishii	strategic	254.9K	¥280	-7.1%	¥14M ($89K)
2025-07-23	BUY	unknown	有限会社KIMアセント KIM Ascent Ltd.	strategic	1.0M	¥280	+7.1%	¥288M ($1.9M)
2025-07-23	BUY	unknown	有限会社KIMアセント KIM Ascent Ltd.	strategic	1.0M	¥280	+7.1%	¥288M ($1.9M)
2025-06-25	BUY	unknown	NPO法人Cig塾 npohoujin cigjuku	other	1.3M	¥240	+25.0%	¥23M ($150K)
2025-06-25	BUY	Market Buy	NPO法人Cig塾 npohoujin cigjuku	other	1.3M	¥240	+25.0%	¥23M ($150K)
2025-05-14	BUY	Market Buy	有限会社KIMアセント KIM Ascent Ltd.	strategic	1.0M	¥200	+50.0%	¥13M ($84K)
2025-05-14	BUY	Market Buy	石井露 Tsuyoshi Ishii	strategic	304.4K	¥200	+50.0%	¥5M ($32K)
2024-04-11	BUY	Market Buy	大石禅 Zen Oishi	activist	31.0K	¥210	+42.9%	¥6M ($39K)
2024-04-11	BUY	Market Buy	大石秀子 Hideko Oishi	activist	31.0K	¥210	+42.9%	¥2M ($12K)
2024-04-11	BUY	Market Buy	大石正德 MASANORI OISHI	activist	31.0K	¥210	+42.9%	¥1M ($7K)
2022-09-21	BUY	Market Buy	大石禅 Zen Oishi	activist	199.9K	¥360	-16.7%	¥3M ($22K)
2022-09-21	SELL	Market Buy	大石秀子 Hideko Oishi	activist	22.0K	¥360	+16.7%	¥43M ($275K)
2022-09-21	BUY	Market Buy	大石正德 MASANORI OISHI	activist	25.5K	¥360	-16.7%	¥1M ($9K)
2021-06-18	BUY	unknown	大石禅 Zen Oishi	activist	176.1K	¥286.364	+4.8%	¥50M ($325K)
2021-06-18	BUY	unknown	大石秀子 Hideko Oishi	activist	130.0K	¥286.364	+4.8%	¥36M ($232K)
2021-06-18	BUY	Market Buy	有限会社KIMアセント KIM Ascent Ltd.	strategic	831.0K	¥286.364	+4.8%	¥83M ($538K)
2021-06-18	SELL	unknown	大石正德 MASANORI OISHI	activist	20.0K	¥286.364	-4.8%	¥1M ($7K)
2021-06-18	BUY	Market Buy	石井露 Tsuyoshi Ishii	strategic	241.1K	¥286.364	+4.8%	¥69M ($445K)
2021-05-14	BUY	unknown	大石禅 Zen Oishi	activist	176.1K	¥256.74	+16.9%	¥2M ($11K)
2021-05-14	SELL	unknown	大石秀子 Hideko Oishi	activist	425.7K	¥256.74	-16.9%	¥12M ($80K)
2021-05-14	BUY	Market Buy	大石禅 Zen Oishi	activist	176.1K	¥256.74	+16.9%	¥2M ($11K)
2021-05-14	SELL	Market Buy	大石秀子 Hideko Oishi	activist	425.7K	¥256.74	-16.9%	¥12M ($80K)
2021-05-14	BUY	Market Buy	大石正德 MASANORI OISHI	activist	24.0K	¥256.74	+16.9%	¥1M ($7K)
2021-05-14	BUY	unknown	大石正德 MASANORI OISHI	activist	24.0K	¥256.74	+16.9%	¥1M ($7K)
2021-03-30	BUY	Market Buy	石井露 Tsuyoshi Ishii	strategic	241.1K	¥197.492	+51.9%	¥1M ($8K)
2021-03-30	BUY	Market Buy	有限会社KIMアセント KIM Ascent Ltd.	strategic	539.8K	¥197.492	+51.9%	¥13M ($81K)

Frequently asked questions

Who has been buying Chuou International Group Co., Ltd. stock?: 6 distinct investors have filed 16 disclosed large-shareholding filings in Chuou International Group Co., Ltd. (7170), most recently on 2025-07-23. 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 Chuou International Group Co., Ltd. have?: Chuou International Group Co., Ltd. has 16 buy-side and 6 sell-side disclosures on record, covering ¥180M ($1.2M) in total reported value, spanning 2021-03-30 to 2025-07-23.
Where does StockDrifts get Chuou International Group 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 Chuou International Group Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.