Who has been buying Kyosan Electric Manufacturing Co., Ltd. stock?

8 distinct investors have filed 11 disclosed large-shareholding filings in Kyosan Electric Manufacturing Co., Ltd. (6742), most recently on 2026-01-23. 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 Kyosan Electric Manufacturing Co., Ltd. have?

Kyosan Electric Manufacturing Co., Ltd. has 11 buy-side and 4 sell-side disclosures on record, covering ¥866M ($5.6M) in total reported value, spanning 2023-05-09 to 2026-01-23.

Where does StockDrifts get Kyosan Electric Manufacturing 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.

Kyosan Electric Manufacturing Co., Ltd. 6742

Company

株式会社京三製作所Kyosan Electric Manufacturing Co., Ltd.

Investors

Buys

Total Value

¥866M ($5.6M)

Avg Return

+24.73%

Last Filing

2026-01-23

Kyosan Electric Manufacturing Co., Ltd. (6742) has 11 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥866M ($5.6M) in reported transaction value. The earliest filing StockDrifts holds for Kyosan Electric Manufacturing Co., Ltd. is dated 2023-05-09; the most recent is 2026-01-23. 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 +24.73%, 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
2026-01-23	BUY	Market Buy	京三みづほ会理事長佐藤洋一 Hirokazu Sato, President of Kyosan Mizuhokai	other	5.1M	¥652	+7.7%	¥410M ($2.6M)
2026-01-23	BUY	Market Buy	京三みづほ会理事長佐藤洋一 Hirokazu Sato, President of Kyosan Mizuhokai	other	4.5M	¥652	+7.7%	¥418M ($2.7M)
2026-01-23	BUY	Market Buy	京三みづほ会理事長佐藤洋一 Hirokazu Sato, President of Kyosan Mizuhokai	other	3.8M	¥652	+7.7%	¥434M ($2.8M)
2026-01-23	BUY	unknown	京三みづほ会理事長佐藤洋一 Hirokazu Sato, President of Kyosan Mizuhokai	other	3.2M	¥652	+7.7%	¥2.1B ($13.3M)
2026-01-23	SELL	unknown	京三みづほ会理事長佐藤洋一 Hirokazu Sato, President of Kyosan Mizuhokai	other	772.6K	¥652	-7.7%	¥2.8B ($18.2M)
2025-12-12	BUY	unknown	京三みづほ会理事長佐藤洋一 Kyosan Mizuho Kai Chairman Hirokazu Sato	other	5.0M	¥605	+16.0%	¥361M ($2.3M)
2025-12-12	BUY	unknown	京三みづほ会理事長佐藤洋一 Kyosan Mizuho Kai Chairman Hirokazu Sato	other	4.4M	¥605	+16.0%	¥369M ($2.4M)
2025-12-12	BUY	unknown	京三みづほ会理事長佐藤洋一 Kyosan Mizuho Kai Chairman Hirokazu Sato	other	3.8M	¥605	+16.0%	¥403M ($2.6M)
2025-12-12	BUY	unknown	京三みづほ会理事長佐藤洋一 Kyosan Mizuho Kai Chairman Hirokazu Sato	other	3.2M	¥605	+16.0%	¥1.9B ($12.3M)
2025-12-12	BUY	Market Buy	京三みづほ会理事長佐藤洋一 Kyosan Mizuho Kai Chairman Hirokazu Sato	other	5.0M	¥605	+16.0%	¥361M ($2.3M)
2025-12-12	BUY	Market Buy	京三みづほ会理事長佐藤洋一 Kyosan Mizuho Kai Chairman Hirokazu Sato	other	4.4M	¥605	+16.0%	¥369M ($2.4M)
2025-12-12	BUY	Market Buy	京三みづほ会理事長佐藤洋一 Kyosan Mizuho Kai Chairman Hirokazu Sato	other	3.8M	¥605	+16.0%	¥403M ($2.6M)
2025-12-12	BUY	unknown	京三みづほ会理事長佐藤洋一 Kyosan Mizuho Kai Chairman Hirokazu Sato	other	3.2M	¥605	+16.0%	¥1.9B ($12.3M)
2025-12-12	SELL	unknown	京三みづほ会理事長佐藤洋一 Kyosan Mizuho Kai Chairman Hirokazu Sato	other	728.5K	¥605	-16.0%	¥2.6B ($16.8M)
2025-12-12	BUY	unknown	京三みづほ会理事長佐藤洋一 Kyosan Mizuho Kai Chairman Hirokazu Sato	other	728.5K	¥605	+16.0%	¥2.6B ($16.8M)
2023-09-04	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	63.6K	¥461	+52.3%	¥29M ($189K)
2023-09-04	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	255.3K	¥461	+52.3%	¥52M ($336K)
2023-09-04	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.5M	¥461	-52.3%	¥304M ($2.0M)
2023-09-04	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.2M	¥461	-52.3%	¥55M ($355K)
2023-05-09	BUY	negotiated	株式会社神奈川銀行 Kanagawa Bank, Ltd.	strategic	100.0K	¥432	+62.5%	¥43M ($279K)
2023-05-09	BUY	negotiated	株式会社横浜銀行 The Bank of Yokohama. Ltd	strategic	3.1M	¥432	+62.5%	¥1.3B ($8.7M)

Frequently asked questions

Who has been buying Kyosan Electric Manufacturing Co., Ltd. stock?: 8 distinct investors have filed 11 disclosed large-shareholding filings in Kyosan Electric Manufacturing Co., Ltd. (6742), most recently on 2026-01-23. 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 Kyosan Electric Manufacturing Co., Ltd. have?: Kyosan Electric Manufacturing Co., Ltd. has 11 buy-side and 4 sell-side disclosures on record, covering ¥866M ($5.6M) in total reported value, spanning 2023-05-09 to 2026-01-23.
Where does StockDrifts get Kyosan Electric Manufacturing 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 Kyosan Electric Manufacturing Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.