Who has been buying Nippon Ceramic Co., Ltd. stock?

16 distinct investors have filed 9 disclosed large-shareholding filings in Nippon Ceramic Co., Ltd. (6929), most recently on 2026-04-07. 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 Nippon Ceramic Co., Ltd. have?

Nippon Ceramic Co., Ltd. has 9 buy-side and 21 sell-side disclosures on record, covering ¥10.1B ($65.0M) in total reported value, spanning 2021-07-07 to 2026-04-07.

Where does StockDrifts get Nippon Ceramic 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.

Nippon Ceramic Co., Ltd. 6929

Company

日本セラミック株式会社Nippon Ceramic Co., Ltd.

Investors

Buys

Total Value

¥10.1B ($65.0M)

Avg Return

+28.34%

Last Filing

2026-04-07

Nippon Ceramic Co., Ltd. (6929) has 9 disclosed large-shareholding filings and 21 disclosed disposals on record, filed by 16 distinct investors. Together those filings cover ¥10.1B ($65.0M) in reported transaction value. The earliest filing StockDrifts holds for Nippon Ceramic Co., Ltd. is dated 2021-07-07; the most recent is 2026-04-07. 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 +28.34%, 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
2026-05-15	BUY	unknown	谷口興産有限会社	strategic	3.8M	¥4,200	-3.7%	¥15.9B ($102.5M)
2026-05-15	BUY	unknown	日セラ興産株式会社	strategic	1.1M	¥4,200	-3.7%	¥4.7B ($30.2M)
2026-05-15	BUY	unknown	有限会社山本自動車	strategic	347.0K	¥4,200	-3.7%	¥1.5B ($9.4M)
2026-05-15	BUY	unknown	谷口真一	activist	455.2K	¥4,200	-3.7%	¥1.9B ($12.3M)
2026-05-15	BUY	unknown	谷口興産有限会社	strategic	3.8M	¥4,200	-3.7%	¥15.9B ($102.5M)
2026-05-15	BUY	unknown	日セラ興産株式会社	strategic	1.1M	¥4,200	-3.7%	¥4.7B ($30.2M)
2026-05-15	BUY	unknown	有限会社山本自動車	strategic	347.0K	¥4,200	-3.7%	¥1.5B ($9.4M)
2026-05-15	BUY	unknown	谷口真一	activist	455.2K	¥4,200	-3.7%	¥1.9B ($12.3M)
2026-04-07	BUY	Market Buy	SMBC日興証券株式会社	other	37.3K	¥3,520	+1.9%	¥131M ($847K)
2026-04-07	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	1.4M	¥3,520	+1.9%	¥4.8B ($31.2M)
2025-06-30	SELL	Market Buy	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	13.5K	¥2,806	-28.3%	¥183M ($1.2M)
2025-06-30	SELL	Market Buy	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	281.7K	¥2,806	-28.3%	¥504M ($3.3M)
2025-06-30	SELL	Market Buy	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	666.2K	¥2,806	-28.3%	¥573M ($3.7M)
2024-09-30	BUY	Market Buy	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	78.1K	¥2,529	+42.4%	¥197M ($1.3M)
2024-09-30	BUY	Market Buy	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	459.5K	¥2,529	+42.4%	¥1.2B ($7.5M)
2024-09-30	BUY	Market Buy	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	872.5K	¥2,529	+42.4%	¥2.2B ($14.2M)
2023-11-24	SELL	unknown	谷口洋子 Taniguchi Yoko	strategic	114.9K	¥2,791	-29.0%	¥319M ($2.1M)
2023-11-24	SELL	unknown	谷口興産有限会社 Taniguchi Kosan Co., Ltd.	strategic	3.8M	¥2,791	-29.0%	¥372M ($2.4M)
2023-11-24	SELL	unknown	日セラ興産株式会社 Nissera Kosan Co., Ltd.	strategic	1.1M	¥2,791	-29.0%	¥106M ($686K)
2023-11-24	SELL	unknown	谷口興産有限会社 Taniguchi Kosan Co., Ltd.	strategic	3.8M	¥2,791	-29.0%	¥372M ($2.4M)
2023-11-24	SELL	unknown	日セラ興産株式会社 Nissera Kosan Co., Ltd.	strategic	1.1M	¥2,791	-29.0%	¥106M ($686K)
2023-11-24	SELL	unknown	谷口洋子 Taniguchi Yoko	other	114.9K	¥2,791	-29.0%	¥319M ($2.1M)
2023-06-21	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	33.3K	¥2,703	+33.2%	¥90M ($581K)
2023-06-21	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	306.3K	¥2,703	-33.2%	¥434M ($2.8M)
2023-06-21	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	987.6K	¥2,703	-33.2%	¥420M ($2.7M)
2023-06-07	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.	other	15.9K	¥2,515	-43.1%	¥34M ($221K)
2023-06-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.1M	¥2,515	+43.1%	¥2.7B ($17.3M)
2023-06-07	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	14.0K	¥2,515	-43.1%	¥82M ($530K)
2023-02-06	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	464.5K	¥2,650	-35.9%	¥281M ($1.8M)
2023-02-06	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	¥2,650	-35.9%	¥462M ($3.0M)
2023-02-06	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	33.3K	¥2,650	+35.9%	¥88M ($569K)
2022-11-22	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	1.2M	¥2,663	-35.2%	¥863M ($5.6M)
2022-11-08	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	1.6M	¥2,612	-37.8%	¥1.4B ($9.3M)
2022-06-07	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	2.1M	¥2,143	-68.0%	¥788M ($5.1M)
2021-12-22	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	28.6K	¥2,744	+31.2%	¥78M ($506K)
2021-12-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.6M	¥2,744	+31.2%	¥628M ($4.0M)
2021-12-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	46.7K	¥2,744	+31.2%	¥128M ($827K)
2021-12-06	BUY	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	1.3M	¥2,871	+25.4%	¥446M ($2.9M)
2021-12-06	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	33.3K	¥2,871	+25.4%	¥96M ($617K)
2021-12-06	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	571.3K	¥2,871	-25.4%	¥821M ($5.3M)
2021-07-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.4M	¥2,889	+24.6%	¥4.0B ($25.6M)
2021-07-07	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	17.7K	¥2,889	-24.6%	¥47M ($305K)
2021-07-07	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	unknown	0	¥2,889	-24.6%	¥102M ($660K)

Frequently asked questions

Who has been buying Nippon Ceramic Co., Ltd. stock?: 16 distinct investors have filed 9 disclosed large-shareholding filings in Nippon Ceramic Co., Ltd. (6929), most recently on 2026-04-07. 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 Nippon Ceramic Co., Ltd. have?: Nippon Ceramic Co., Ltd. has 9 buy-side and 21 sell-side disclosures on record, covering ¥10.1B ($65.0M) in total reported value, spanning 2021-07-07 to 2026-04-07.
Where does StockDrifts get Nippon Ceramic 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 Nippon Ceramic Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.