Who has been buying Kasumigaseki Capital Co.,Ltd. stock?

16 distinct investors have filed 49 disclosed large-shareholding filings in Kasumigaseki Capital Co.,Ltd. (3498), most recently on 2026-05-13. 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 Kasumigaseki Capital Co.,Ltd. have?

Kasumigaseki Capital Co.,Ltd. has 49 buy-side and 54 sell-side disclosures on record, covering ¥144.3B ($931.2M) in total reported value, spanning 2021-12-15 to 2026-05-13.

Where does StockDrifts get Kasumigaseki Capital 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.

Kasumigaseki Capital Co.,Ltd. 3498

Company

霞ヶ関キャピタル株式会社Kasumigaseki Capital Co.,Ltd.

Investors

Buys

Total Value

¥144.3B ($931.2M)

Avg Return

-4.99%

Last Filing

2026-05-13

Kasumigaseki Capital Co.,Ltd. (3498) has 49 disclosed large-shareholding filings and 54 disclosed disposals on record, filed by 16 distinct investors. Together those filings cover ¥144.3B ($931.2M) in reported transaction value. The earliest filing StockDrifts holds for Kasumigaseki Capital Co.,Ltd. is dated 2021-12-15; the most recent is 2026-05-13. 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 -4.99%, 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
2026-07-27	BUY	Market Buy	グランサム、マヨ、ヴァンオッテルローアンドカンパニーエルエルシー(Grantham, Mayo, Van Otterloo & Co. LLC) Grantham, Mayo, Van Otterloo & Co. LLC	activist	1.5M	¥7,380	+10.2%	¥2.1B ($13.2M)
2026-07-17	BUY	Market Buy	グランサム、マヨ、ヴァンオッテルローアンドカンパニーエルエルシー(Grantham, Mayo, Van Otterloo & Co. LLC) Grantham, Mayo, Van Otterloo & Co. LLC	activist	1.3M	¥6,810	+19.4%	¥8.7B ($55.8M)
2026-06-09	BUY	unknown	合同会社BANKCY	strategic	600.0K	¥5,550	+23.1%	¥3.3B ($21.5M)
2026-06-09	BUY	negotiated	小川潤之	activist	3.7M	¥5,550	+23.1%	¥20.3B ($130.7M)
2026-06-04	BUY	Market Buy	野村アセットマネジメント株式会社	other	638.2K	¥5,550	+27.0%	¥123M ($792K)
2026-06-04	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	614.9K	¥5,550	-27.0%	¥355M ($2.3M)
2026-06-04	SELL	unknown	野村證券株式会社	other	-1.1K	¥5,550	-27.0%	¥55M ($352K)
2026-05-29	BUY	negotiated	小川潤之	activist	3.7M	¥6,080	+9.1%	¥22.2B ($143.2M)
2026-05-29	BUY	unknown	合同会社BANKCY	strategic	600.0K	¥6,080	+9.1%	¥3.6B ($23.5M)
2026-05-29	BUY	negotiated	小川潤之	activist	3.7M	¥6,080	+9.1%	¥22.2B ($143.2M)
2026-05-29	BUY	unknown	合同会社BANKCY	strategic	600.0K	¥6,080	+9.1%	¥3.6B ($23.5M)
2026-05-21	BUY	unknown	合同会社BANKCY	strategic	600.0K	¥5,870	-1.5%	¥3.5B ($22.7M)
2026-05-21	SELL	negotiated	小川潤之	activist	3.7M	¥5,870	+1.5%	¥3.5B ($22.7M)
2026-05-21	BUY	unknown	合同会社BANKCY	strategic	600.0K	¥5,870	-1.5%	¥3.5B ($22.7M)
2026-05-21	SELL	negotiated	小川潤之	activist	3.7M	¥5,870	+1.5%	¥3.5B ($22.7M)
2026-05-19	SELL	negotiated	小川潤之 HIROYUKI OGAWA	activist	4.3M	¥6,070	+4.8%	¥836M ($5.4M)
2026-05-13	BUY	unknown	みずほインターナショナル Mizuho International plc	other	0	¥6,180	-7.6%	-
2026-05-13	SELL	unknown	アセットマネジメントOne株式会社	other	353.5K	¥6,180	+7.6%	¥30M ($196K)
2026-05-13	BUY	subscription	みずほ証券株式会社	other	2.5M	¥6,180	-7.6%	¥897M ($5.8M)
2026-05-12	BUY	Market Buy	キャピタル・インターナショナル・エス・エイ・アール・エル Capital International Sarl	passive	52.7K	¥6,170	-7.5%	¥76M ($489K)
2026-05-12	BUY	Market Buy	キャピタル・インターナショナル株式会社	passive	104.8K	¥6,170	-7.5%	¥167M ($1.1M)
2026-05-12	BUY	Market Buy	キャピタル・インターナショナル・インク Capital International, Inc	passive	96.7K	¥6,170	-7.5%	¥152M ($979K)
2026-05-12	BUY	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー Capital Research and Management Company	passive	2.0M	¥6,170	-7.5%	¥12.1B ($78.2M)
2026-04-22	SELL	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー Capital Research and Management Company	passive	2.0M	¥6,950	+15.5%	¥17M ($110K)
2026-04-22	SELL	Market Buy	キャピタル・インターナショナル・エス・エイ・アール・エル Capital International Sarl	passive	39.6K	¥6,950	+15.5%	¥51M ($331K)
2026-04-22	SELL	Market Buy	キャピタル・インターナショナル株式会社	passive	78.4K	¥6,950	+15.5%	¥17M ($110K)
2026-04-22	BUY	Market Buy	キャピタル・インターナショナル・インク Capital International, Inc	passive	72.2K	¥6,950	-15.5%	¥502M ($3.2M)
2026-04-21	BUY	Market Buy	野村アセットマネジメント株式会社	other	605.7K	¥7,020	-13.3%	¥1.3B ($8.6M)
2026-04-21	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	680.3K	¥7,020	+13.3%	¥742M ($4.8M)
2026-04-21	SELL	unknown	野村證券株式会社	other	9.0K	¥7,020	+13.3%	¥1.2B ($7.9M)
2026-04-06	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	788.2K	¥6,320	+2.2%	¥777M ($5.0M)
2026-04-06	BUY	Market Buy	野村證券株式会社	other	184.4K	¥6,320	+2.2%	¥311M ($2.0M)
2026-04-06	SELL	Market Buy	野村アセットマネジメント株式会社	other	414.5K	¥6,320	-2.2%	¥466M ($3.0M)
2026-03-23	BUY	Market Buy	キャピタル・インターナショナル・エス・エイ・アール・エル Capital International Sarl	passive	46.2K	¥6,150	-8.9%	¥310M ($2.0M)
2026-03-23	SELL	Market Buy	キャピタル・インターナショナル株式会社	passive	81.2K	¥6,150	-8.9%	¥544M ($3.5M)
2026-03-23	BUY	Market Buy	キャピタル・インターナショナル・インク(Capital International	passive	72.2K	¥6,150	-8.9%	¥484M ($3.1M)
2026-03-23	BUY	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー Capital Research and Management Company	passive	2.0M	¥6,150	+8.9%	¥13.2B ($84.9M)
2026-02-09	BUY	subscription	みずほインターナショナル Mizuho International plc	other	0	¥7,100	+5.6%	-
2026-02-09	BUY	subscription	アセットマネジメントOne株式会社	other	366.1K	¥7,100	-5.6%	¥2.5B ($15.8M)
2026-02-09	SELL	subscription	みずほ証券株式会社	other	2.4M	¥7,100	+5.6%	¥16.1B ($103.6M)
2026-02-06	BUY	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー（Capital Research and Management Company） Capital Research and Management Company	passive	1.5M	¥7,200	-6.9%	¥11.1B ($71.8M)
2026-01-09	SELL	unknown	野村アセットマネジメント株式会社	other	487.8K	¥7,450	+10.1%	¥3.3B ($21.1M)
2026-01-09	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	663.2K	¥7,450	+10.1%	¥4.4B ($28.7M)
2026-01-09	SELL	unknown	野村證券株式会社	other	134.8K	¥7,450	+10.1%	¥903M ($5.8M)
2025-12-19	BUY	unknown	みずほインターナショナル Mizuho International plc	other	0	¥7,550	+11.3%	-
2025-12-19	SELL	unknown	アセットマネジメントOne株式会社	other	345.8K	¥7,550	+11.3%	¥2.3B ($14.9M)
2025-12-19	SELL	unknown	みずほ証券株式会社	other	2.4M	¥7,550	+11.3%	¥16.0B ($103.0M)
2025-12-05	BUY	unknown	野村アセットマネジメント株式会社	other	602.7K	¥7,940	-15.6%	¥4.0B ($26.1M)
2025-12-05	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	765.6K	¥7,940	+15.6%	¥5.1B ($33.1M)
2025-12-05	SELL	unknown	野村證券株式会社	other	155.1K	¥7,940	+15.6%	¥1.0B ($6.7M)

Showing the 50 most recent of 164 filings.

Frequently asked questions

Who has been buying Kasumigaseki Capital Co.,Ltd. stock?: 16 distinct investors have filed 49 disclosed large-shareholding filings in Kasumigaseki Capital Co.,Ltd. (3498), most recently on 2026-05-13. 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 Kasumigaseki Capital Co.,Ltd. have?: Kasumigaseki Capital Co.,Ltd. has 49 buy-side and 54 sell-side disclosures on record, covering ¥144.3B ($931.2M) in total reported value, spanning 2021-12-15 to 2026-05-13.
Where does StockDrifts get Kasumigaseki Capital 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 Kasumigaseki Capital Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.