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

9 distinct investors have filed 21 disclosed large-shareholding filings in Nippon Carbon Co., Ltd. (5302), most recently on 2026-04-06. 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 Carbon Co., Ltd. have?

Nippon Carbon Co., Ltd. has 21 buy-side and 13 sell-side disclosures on record, covering ¥8.8B ($56.9M) in total reported value, spanning 2021-03-19 to 2026-04-06.

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 Carbon Co., Ltd. 5302

Company

日本カーボン株式会社Nippon Carbon Co., Ltd.

Investors

Buys

Total Value

¥8.8B ($56.9M)

Avg Return

+10.40%

Last Filing

2026-04-06

Nippon Carbon Co., Ltd. (5302) has 21 disclosed large-shareholding filings and 13 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥8.8B ($56.9M) in reported transaction value. The earliest filing StockDrifts holds for Nippon Carbon Co., Ltd. is dated 2021-03-19; the most recent is 2026-04-06. Across these filings the average return since disclosure is +10.40%, 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
2026-04-06	BUY	Market Buy	野村證券株式会社	other	6.8K	¥4,715	+7.3%	¥39M ($252K)
2026-04-06	SELL	Market Buy	野村アセットマネジメント株式会社	other	468.7K	¥4,715	-7.3%	¥457M ($3.0M)
2026-04-06	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	-13.7K	¥4,715	-1.1%	¥206M ($1.3M)
2025-03-21	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	-800	¥4,230	+12.9%	-
2025-03-21	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	29.0K	¥4,230	+19.6%	¥123M ($792K)
2025-03-21	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	565.8K	¥4,230	+19.6%	¥2.4B ($15.4M)
2025-03-05	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	-702	¥4,085	-16.9%	¥11.6B ($74.9M)
2025-03-05	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	30.8K	¥4,085	-23.9%	¥68M ($437K)
2025-03-05	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	547.7K	¥4,085	+23.9%	¥77M ($499K)
2024-08-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	47.2K	¥4,365	+15.9%	¥206M ($1.3M)
2024-08-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	28.3K	¥4,365	+15.9%	¥124M ($797K)
2024-08-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	529.5K	¥4,365	+15.9%	¥2.3B ($14.9M)
2024-07-04	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-4.1K	¥5,310	+10.1%	¥748M ($4.8M)
2024-07-04	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	49.1K	¥5,310	-	¥260M ($1.7M)
2024-07-04	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	498.7K	¥5,310	+4.7%	¥113M ($730K)
2024-04-04	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	137.2K	¥5,380	-6.0%	¥586M ($3.8M)
2024-04-04	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	519.3K	¥5,380	+6.0%	¥267M ($1.7M)
2023-12-20	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	28.4K	¥4,570	-10.7%	¥168M ($1.1M)
2023-12-20	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	568.9K	¥4,570	+10.7%	¥2.6B ($16.6M)
2023-11-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	551.7K	¥4,605	-	-
2023-11-22	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	59.6K	¥4,605	-9.9%	¥5M ($35K)
2023-11-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	241.1K	¥4,605	-9.9%	¥670M ($4.3M)
2022-07-22	SELL	unknown	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	415.6K	¥4,040	-25.3%	¥272M ($1.8M)
2022-07-22	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	160.4K	¥4,040	+25.3%	¥10M ($62K)
2022-06-21	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	400	¥4,180	-21.1%	¥79M ($511K)
2022-06-21	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	65.3K	¥4,180	+21.1%	¥287M ($1.9M)
2022-06-21	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	657.7K	¥4,180	+21.1%	¥336M ($2.2M)
2022-02-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	551.7K	¥4,125	-	-
2022-02-22	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	60.9K	¥4,125	-	-
2022-02-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	387.1K	¥4,125	-22.7%	¥508M ($3.3M)
2022-01-11	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-3.0K	¥4,205	+13.6%	-
2022-01-11	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	19.3K	¥4,205	+20.3%	¥81M ($524K)
2022-01-11	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	577.6K	¥4,205	+20.3%	¥2.4B ($15.7M)
2021-04-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	551.7K	¥4,790	-	-
2021-04-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	5.1K	¥4,790	+5.6%	¥2.2B ($14.1M)
2021-04-07	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	60.9K	¥4,790	+5.6%	¥79M ($512K)
2021-04-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	510.2K	¥4,790	+5.6%	¥810M ($5.2M)
2021-03-19	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	158.4K	¥3,758.677	+34.6%	¥595M ($3.8M)
2021-03-19	BUY	unknown	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	482.6K	¥3,758.677	+34.6%	¥1.8B ($11.7M)

Frequently asked questions

Who has been buying Nippon Carbon Co., Ltd. stock?: 9 distinct investors have filed 21 disclosed large-shareholding filings in Nippon Carbon Co., Ltd. (5302), most recently on 2026-04-06. 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 Carbon Co., Ltd. have?: Nippon Carbon Co., Ltd. has 21 buy-side and 13 sell-side disclosures on record, covering ¥8.8B ($56.9M) in total reported value, spanning 2021-03-19 to 2026-04-06.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.