Who has been buying Kanto Denka Kogyo Co., Ltd. stock?

14 distinct investors have filed 25 disclosed large-shareholding filings in Kanto Denka Kogyo Co., Ltd. (4047), most recently on 2026-05-12. 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 Kanto Denka Kogyo Co., Ltd. have?

Kanto Denka Kogyo Co., Ltd. has 25 buy-side and 5 sell-side disclosures on record, covering ¥11.9B ($76.6M) in total reported value, spanning 2021-03-19 to 2026-05-12.

Where does StockDrifts get Kanto Denka Kogyo 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.

Kanto Denka Kogyo Co., Ltd. 4047

Company

関東電化工業株式会社Kanto Denka Kogyo Co., Ltd.

Investors

Buys

Total Value

¥11.9B ($76.6M)

Avg Return

+71.25%

Last Filing

2026-05-12

Kanto Denka Kogyo Co., Ltd. (4047) has 25 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 14 distinct investors. Together those filings cover ¥11.9B ($76.6M) in reported transaction value. The earliest filing StockDrifts holds for Kanto Denka Kogyo Co., Ltd. is dated 2021-03-19; the most recent is 2026-05-12. 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 +71.25%, 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
2026-06-05	SELL	Market Buy	朝日ライフアセットマネジメント株式会社	passive	0	¥4,095	+15.0%	¥566M ($3.6M)
2026-06-05	BUY	Market Buy	朝日生命保険相互会社	passive	3.6M	¥4,095	-15.0%	¥14.6B ($94.3M)
2026-05-12	BUY	Market Buy	朝日ライフアセットマネジメント株式会社	passive	135.4K	¥1,971	+107.8%	¥267M ($1.7M)
2026-05-12	BUY	Market Buy	朝日生命保険相互会社	passive	3.6M	¥1,971	+107.8%	¥7.0B ($45.4M)
2026-02-26	BUY	unknown	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	activist	11.4M	¥1,717	-5.0%	¥19.6B ($126.4M)
2025-09-22	BUY	unknown	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	activist	11.4M	¥943	+73.1%	¥10.8B ($69.4M)
2025-08-18	BUY	unknown	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	activist	11.4M	¥828	+97.1%	¥9.4B ($61.0M)
2025-04-10	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	11.4M	¥802	+103.5%	¥328M ($2.1M)
2025-03-06	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	661.4K	¥901	+81.1%	¥21M ($134K)
2025-03-06	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	1.1M	¥901	-81.1%	¥342M ($2.2M)
2025-03-06	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	541.2K	¥901	-81.1%	¥327M ($2.1M)
2024-12-02	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	11.0M	¥1,057	+54.4%	¥669M ($4.3M)
2024-11-25	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	10.4M	¥1,077	+51.5%	¥762M ($4.9M)
2024-11-18	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	9.7M	¥945	+72.7%	¥750M ($4.8M)
2024-11-08	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	8.9M	¥1,005	+62.4%	¥688M ($4.4M)
2024-10-10	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	8.2M	¥958	+70.3%	¥639M ($4.1M)
2023-12-18	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	7.5M	¥816	+100.0%	¥423M ($2.7M)
2023-10-03	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	7.0M	¥848	+92.5%	¥488M ($3.1M)
2023-08-24	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	6.4M	¥820	+99.0%	¥491M ($3.2M)
2023-05-02	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	5.8M	¥1,036	+57.5%	¥6.0B ($38.9M)
2023-05-01	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	5.8M	¥1,032	+58.1%	¥6.0B ($38.8M)
2023-04-10	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	5.8M	¥992	+64.5%	¥29M ($184K)
2023-03-28	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	5.8M	¥1,007	+62.1%	¥12M ($75K)
2023-03-27	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	5.8M	¥1,013	+61.1%	¥589M ($3.8M)
2023-02-06	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	5.2M	¥995	+64.0%	¥573M ($3.7M)
2022-12-21	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.6M	¥913	+78.8%	¥394M ($2.5M)
2022-12-06	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.2M	¥988	+65.2%	¥131M ($844K)
2022-11-07	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.1M	¥973	+67.7%	¥4.0B ($25.5M)
2022-09-22	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.1M	¥972	+67.9%	¥3.9B ($25.5M)
2022-09-21	BUY	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc	other	77.0K	¥975	+67.4%	¥45M ($292K)
2022-09-21	BUY	Market Buy	JPモルガン証券株式会社 JPMorgan Securities Japan Co., Ltd.	other	1.5M	¥975	+67.4%	¥1.4B ($8.8M)
2022-09-06	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.1M	¥983	+66.0%	¥4.0B ($25.8M)
2022-08-19	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.1M	¥989	+65.0%	¥4.0B ($25.9M)
2022-08-03	BUY	unknown	ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc	other	2.8M	¥915	+78.4%	¥1.1B ($7.2M)
2022-08-03	SELL	unknown	JPモルガン証券株式会社 JPMorgan Securities Japan Co., Ltd.	other	56.1K	¥915	-78.4%	¥1.2B ($7.7M)
2022-07-22	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.1M	¥913	+78.8%	¥3.7B ($23.9M)
2022-06-21	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.1M	¥889	+83.6%	¥3.6B ($23.3M)
2022-06-03	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.4M	¥947	+72.3%	¥2.2B ($14.4M)
2022-06-03	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	109.6K	¥947	+72.3%	¥104M ($670K)
2022-05-10	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.1M	¥958	+70.3%	¥3.9B ($25.1M)
2022-05-06	BUY	unknown	ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc	other	1.6M	¥972	+67.9%	¥1.6B ($10.1M)
2022-05-06	BUY	unknown	JPモルガン証券株式会社 JPMorgan Securities Japan Co., Ltd.	other	1.4M	¥972	+67.9%	¥1.3B ($8.5M)
2022-04-21	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.1M	¥990	+64.8%	¥4.0B ($25.9M)
2022-03-22	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.1M	¥1,091	+49.6%	¥4.4B ($28.6M)
2022-03-04	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.1M	¥1,101	+48.2%	¥4.5B ($28.9M)
2022-02-04	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.1M	¥1,088	+50.0%	¥4.4B ($28.5M)
2022-01-19	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	3.1M	¥1,073	+52.1%	¥3.3B ($21.0M)
2022-01-19	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	36.4K	¥1,073	-52.1%	¥68M ($438K)
2021-12-21	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.1M	¥1,038	+57.2%	¥4.2B ($27.2M)
2021-11-05	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.1M	¥1,020	+60.0%	¥4.1B ($26.7M)

Showing the 50 most recent of 66 filings.

Frequently asked questions

Who has been buying Kanto Denka Kogyo Co., Ltd. stock?: 14 distinct investors have filed 25 disclosed large-shareholding filings in Kanto Denka Kogyo Co., Ltd. (4047), most recently on 2026-05-12. 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 Kanto Denka Kogyo Co., Ltd. have?: Kanto Denka Kogyo Co., Ltd. has 25 buy-side and 5 sell-side disclosures on record, covering ¥11.9B ($76.6M) in total reported value, spanning 2021-03-19 to 2026-05-12.
Where does StockDrifts get Kanto Denka Kogyo 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 Kanto Denka Kogyo Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.