Who has been buying Nihon Dempa Kogyo Co., Ltd. stock?

21 distinct investors have filed 90 disclosed large-shareholding filings in Nihon Dempa Kogyo Co., Ltd. (6779), 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 Nihon Dempa Kogyo Co., Ltd. have?

Nihon Dempa Kogyo Co., Ltd. has 90 buy-side and 68 sell-side disclosures on record, covering ¥15.0B ($96.5M) in total reported value, spanning 2021-06-21 to 2026-05-12.

Where does StockDrifts get Nihon Dempa 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.

Nihon Dempa Kogyo Co., Ltd. 6779

Company

日本電波工業株式会社Nihon Dempa Kogyo Co., Ltd.

Investors

Buys

Total Value

¥15.0B ($96.5M)

Avg Return

+53.88%

Last Filing

2026-05-12

Nihon Dempa Kogyo Co., Ltd. (6779) has 90 disclosed large-shareholding filings and 68 disclosed disposals on record, filed by 21 distinct investors. Together those filings cover ¥15.0B ($96.5M) in reported transaction value. The earliest filing StockDrifts holds for Nihon Dempa Kogyo Co., Ltd. is dated 2021-06-21; 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 +53.88%, 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
2026-08-07	SELL	unknown	野村アセットマネジメント株式会社	other	754.0K	¥2,797	-10.8%	¥6M ($42K)
2026-08-07	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	430.1K	¥2,797	-10.8%	¥602M ($3.9M)
2026-08-07	SELL	unknown	野村證券株式会社	other	39.5K	¥2,797	-10.8%	¥116M ($751K)
2026-08-06	BUY	Market Buy	モルガン・スタンレー・アンド・カンパニー・エルエルシー Morgan Stanley & Co. LLC	other	133.9K	¥2,929	+5.8%	¥54M ($350K)
2026-08-06	SELL	unknown	モルガン・スタンレー・アンド・カンパニー・インターナショナル・ピーエルシー Morgan Stanley & Co. International plc	other	526.8K	¥2,929	-5.8%	¥799M ($5.2M)
2026-08-06	BUY	Market Buy	モルガン・スタンレーMUFG証券株式会社	other	380.8K	¥2,929	+5.8%	¥352M ($2.3M)
2026-07-22	BUY	unknown	モルガン・スタンレー・アンド・カンパニー・エルエルシー Morgan Stanley & Co. LLC	other	116.0K	¥2,850	+8.8%	¥331M ($2.1M)
2026-07-22	BUY	unknown	モルガン・スタンレー・アンド・カンパニー・インターナショナル・ピーエルシー Morgan Stanley & Co. International plc	other	801.1K	¥2,850	+8.8%	¥2.3B ($14.7M)
2026-07-22	BUY	unknown	モルガン・スタンレーMUFG証券株式会社	other	262.4K	¥2,850	+8.8%	¥748M ($4.8M)
2026-07-06	BUY	Market Buy	野村アセットマネジメント株式会社	other	757.2K	¥3,665	-18.9%	¥280M ($1.8M)
2026-07-06	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	646.3K	¥3,665	+18.9%	¥229M ($1.5M)
2026-07-06	SELL	unknown	野村證券株式会社	other	82.0K	¥3,665	+18.9%	¥59M ($383K)
2026-06-22	SELL	unknown	みずほ証券株式会社	other	168.5K	¥4,515	+39.8%	¥52M ($337K)
2026-06-22	SELL	unknown	アセットマネジメントOne株式会社	other	836.1K	¥4,515	+39.8%	¥2.2B ($14.0M)
2026-06-22	BUY	unknown	野村アセットマネジメント株式会社	other	681.1K	¥4,515	-39.8%	¥3.1B ($19.8M)
2026-06-22	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	708.4K	¥4,515	-39.8%	¥3.2B ($20.6M)
2026-06-22	BUY	unknown	野村證券株式会社	other	96.4K	¥4,515	-39.8%	¥435M ($2.8M)
2026-05-12	SELL	unknown	みずほ証券株式会社	other	179.3K	¥2,195	-112.3%	¥15M ($98K)
2026-05-12	SELL	unknown	アセットマネジメントOne株式会社	other	1.3M	¥2,195	-112.3%	¥1.0B ($6.5M)
2026-04-07	BUY	Market Buy	みずほ証券株式会社	other	188.1K	¥1,290	+46.9%	¥212M ($1.4M)
2026-04-07	BUY	Market Buy	アセットマネジメントOne株式会社	other	1.8M	¥1,290	+46.9%	¥206M ($1.3M)
2026-02-05	BUY	Market Buy	野村アセットマネジメント株式会社	other	746.8K	¥1,059	+85.0%	¥1.5B ($9.4M)
2026-02-05	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	335.8K	¥1,059	-85.0%	¥658M ($4.2M)
2025-11-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	576.9K	¥1,115	+75.7%	¥643M ($4.1M)
2025-11-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	743.8K	¥1,115	+75.7%	¥829M ($5.4M)
2025-11-04	SELL	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	265.4K	¥1,143	-71.4%	¥119M ($767K)
2025-11-04	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	485.8K	¥1,143	-71.4%	¥156M ($1.0M)
2025-11-04	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	318.5K	¥1,143	+71.4%	¥364M ($2.3M)
2025-10-21	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	904.3K	¥1,160	-68.9%	¥314M ($2.0M)
2025-10-07	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	24.1K	¥1,091	+79.6%	¥26M ($170K)
2025-10-07	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.6M	¥1,091	+79.6%	¥378M ($2.4M)
2025-09-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.3M	¥961	+103.8%	¥1.2B ($7.9M)
2025-02-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	694.5K	¥856	-128.9%	¥560M ($3.6M)
2025-01-10	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.3M	¥839	-133.5%	¥607M ($3.9M)
2025-01-10	SELL	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	unknown	0	¥839	-133.5%	¥43M ($275K)
2024-12-23	BUY	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	50.7K	¥853	+129.7%	¥43M ($279K)
2024-12-23	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	2.1M	¥853	-129.7%	¥207M ($1.3M)
2024-11-07	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	1.2M	¥1,049	+86.8%	¥1.2B ($8.0M)
2024-09-05	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	172.0K	¥1,093	+79.2%	¥188M ($1.2M)
2024-09-05	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	364.6K	¥1,093	+79.2%	¥3M ($16K)
2024-09-05	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	614.0K	¥1,093	-79.2%	¥293M ($1.9M)
2024-08-22	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	738.7K	¥1,149	+70.5%	¥849M ($5.5M)
2024-08-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	102.3K	¥1,149	-70.5%	¥380M ($2.5M)
2024-07-29	BUY	negotiated	auカブコム証券株式会社 Mitsubishi UFJ Financial Group Inc.	other	8.9K	¥1,419	+38.0%	¥12M ($79K)
2024-07-29	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	370.0K	¥1,419	+38.0%	¥3M ($19K)
2024-07-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	318.5K	¥1,419	+38.0%	¥452M ($2.9M)
2024-07-29	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	6.8K	¥1,419	+38.0%	¥8M ($52K)
2024-07-29	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	621.2K	¥1,419	+38.0%	¥2M ($11K)
2024-07-22	BUY	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	50.7K	¥1,488	+31.6%	¥10M ($67K)
2024-07-22	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	736.8K	¥1,488	+31.6%	¥1.1B ($7.1M)

Showing the 50 most recent of 200 filings.

Frequently asked questions

Who has been buying Nihon Dempa Kogyo Co., Ltd. stock?: 21 distinct investors have filed 90 disclosed large-shareholding filings in Nihon Dempa Kogyo Co., Ltd. (6779), 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 Nihon Dempa Kogyo Co., Ltd. have?: Nihon Dempa Kogyo Co., Ltd. has 90 buy-side and 68 sell-side disclosures on record, covering ¥15.0B ($96.5M) in total reported value, spanning 2021-06-21 to 2026-05-12.
Where does StockDrifts get Nihon Dempa 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 Nihon Dempa Kogyo Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.