Who has been buying NIHON CHOUZAI Co.,Ltd. stock?

9 distinct investors have filed 32 disclosed large-shareholding filings in NIHON CHOUZAI Co.,Ltd. (3341), most recently on 2025-10-06. 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 NIHON CHOUZAI Co.,Ltd. have?

NIHON CHOUZAI Co.,Ltd. has 32 buy-side and 16 sell-side disclosures on record, covering ¥58.9B ($379.8M) in total reported value, spanning 2022-03-04 to 2025-10-06.

Where does StockDrifts get NIHON CHOUZAI 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 CHOUZAI Co.,Ltd. 3341

Company

日本調剤株式会社NIHON CHOUZAI Co.,Ltd.

Investors

Buys

Total Value

¥58.9B ($379.8M)

Avg Return

+140.85%

Last Filing

2025-10-06

NIHON CHOUZAI Co.,Ltd. (3341) has 32 disclosed large-shareholding filings and 16 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥58.9B ($379.8M) in reported transaction value. The earliest filing StockDrifts holds for NIHON CHOUZAI Co.,Ltd. is dated 2022-03-04; the most recent is 2025-10-06. 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 +140.85%, 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
2025-10-06	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	143.2K	¥3,905	-0.1%	¥764M ($4.9M)
2025-10-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	238.9K	¥3,905	+0.1%	¥887M ($5.7M)
2025-10-06	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	26.2K	¥3,905	-0.1%	¥6.1B ($39.1M)
2025-09-24	BUY	unknown	株式会社マックスプランニング Max Planning Co., Ltd.	unknown	5.8M	¥3,930	-0.5%	¥23.0B ($148.1M)
2025-09-24	BUY	acquisition	株式会社マックスプランニング Max Planning Co., Ltd.	strategic	5.8M	¥3,930	-0.5%	¥23.0B ($148.1M)
2025-09-24	BUY	unknown	株式会社マックスプランニング Max Planning Co., Ltd.	unknown	5.8M	¥3,930	-0.5%	¥23.0B ($148.1M)
2025-09-24	BUY	unknown	株式会社マックスプランニング Max Planning Co., Ltd.	strategic	5.8M	¥3,930	-0.5%	¥23.0B ($148.1M)
2025-09-24	SELL	unknown	三津原庸介 Yosuke Mitsuhara	unknown	0	¥3,930	+0.5%	¥26.1B ($168.5M)
2025-09-24	BUY	unknown	株式会社AP86 AP86 Co., Ltd.	activist	21.8M	¥3,930	-0.5%	¥85.8B ($553.5M)
2025-09-24	SELL	unknown	三津原陽子 Yoko Mitsuhara	unknown	0	¥3,930	+0.5%	¥3.1B ($20.3M)
2025-09-24	BUY	acquisition	株式会社AP86 AP86 Co., Ltd.	activist	21.8M	¥3,930	-0.5%	¥85.8B ($553.5M)
2025-09-24	SELL	unknown	三津原博 MITUHARA HIROSHI	unknown	0	¥3,930	+0.5%	¥18.9B ($121.7M)
2025-09-03	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	337.9K	¥3,915	-0.1%	¥1.3B ($8.5M)
2025-09-03	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.2M	¥3,915	-0.1%	¥4.7B ($30.3M)
2025-09-03	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	39.5K	¥3,915	-0.1%	¥155M ($997K)
2025-08-27	BUY	unknown	三津原陽子 Yoko Mitsuhara	unknown	800.0K	¥3,915	-0.1%	¥3.1B ($20.2M)
2025-08-27	BUY	Market Buy	三津原庸介 Yosuke Mitsuhara	strategic	6.6M	¥3,915	-0.1%	¥839M ($5.4M)
2025-08-27	BUY	unknown	株式会社マックスプランニング Max Planning Co., Ltd.	strategic	5.8M	¥3,915	-0.1%	¥22.9B ($147.5M)
2025-08-27	BUY	unknown	株式会社マックスプランニング Max Planning Co., Ltd.	strategic	5.8M	¥3,915	-0.1%	¥22.9B ($147.5M)
2025-08-27	BUY	unknown	三津原陽子 Yoko Mitsuhara	strategic	800.0K	¥3,915	-0.1%	¥3.1B ($20.2M)
2025-08-27	BUY	unknown	三津原陽子 Yoko Mitsuhara	strategic	800.0K	¥3,915	-0.1%	¥3.1B ($20.2M)
2025-08-27	BUY	unknown	三津原博 MITUHARA HIROSHI	strategic	4.8M	¥3,915	-0.1%	¥18.8B ($121.2M)
2025-08-27	BUY	unknown	三津原博 MITUHARA HIROSHI	strategic	4.8M	¥3,915	-0.1%	¥18.8B ($121.2M)
2025-08-27	BUY	unknown	株式会社マックスプランニング Max Planning Co., Ltd.	unknown	5.8M	¥3,915	-0.1%	¥22.9B ($147.5M)
2025-08-27	BUY	unknown	三津原陽子 Yoko Mitsuhara	unknown	800.0K	¥3,915	-0.1%	¥3.1B ($20.2M)
2025-08-27	BUY	unknown	株式会社マックスプランニング Max Planning Co., Ltd.	unknown	5.8M	¥3,915	-0.1%	¥22.9B ($147.5M)
2025-08-27	BUY	unknown	株式会社マックスプランニング Max Planning Co., Ltd.	unknown	5.8M	¥3,915	-0.1%	¥22.9B ($147.5M)
2025-08-27	BUY	unknown	株式会社マックスプランニング Max Planning Co., Ltd.	unknown	5.8M	¥3,915	-0.1%	¥22.9B ($147.5M)
2025-03-18	BUY	unknown	合同会社マックスプランニング Max Planning LLC	unknown	5.8M	¥1,475	+165.1%	¥5.3B ($34.3M)
2025-03-18	BUY	Market Buy	合同会社マックスプランニング Max Planning LLC	unknown	2.2M	¥1,475	+165.1%	¥101M ($650K)
2025-03-18	BUY	unknown	合同会社マックスプランニング Max Planning LLC	unknown	2.2M	¥1,475	+165.1%	¥3.3B ($21.3M)
2025-03-18	BUY	unknown	株式会社三津原興産 Kabushiki Kaisha Mitsuhara Kousan	unknown	3.6M	¥1,475	+165.1%	¥5.3B ($34.3M)
2025-03-18	BUY	unknown	三津原陽子 Yoko Mitsuhara	unknown	800.0K	¥1,475	+165.1%	¥1.2B ($7.6M)
2025-03-18	BUY	unknown	三津原陽子 Yoko Mitsuhara	unknown	800.0K	¥1,475	+165.1%	¥1.2B ($7.6M)
2025-03-18	SELL	unknown	三津原陽子 Yoko Mitsuhara	unknown	800.0K	¥1,475	-165.1%	¥175M ($1.1M)
2025-03-18	BUY	unknown	株式会社三津原興産 Kabushiki Kaisha Mitsuhara Kousan	unknown	3.6M	¥1,475	+165.1%	¥5.3B ($34.3M)
2025-03-18	BUY	unknown	合同会社マックスプランニング Max Planning LLC	unknown	2.2M	¥1,475	+165.1%	¥3.3B ($21.3M)
2025-03-18	BUY	unknown	合同会社マックスプランニング Max Planning LLC	unknown	2.2M	¥1,475	+165.1%	¥3.3B ($21.3M)
2025-03-18	BUY	unknown	合同会社マックスプランニング Max Planning LLC	unknown	2.2M	¥1,475	+165.1%	¥3.3B ($21.3M)
2025-03-18	BUY	unknown	有限会社マックスプランニング Max Planning Co., Ltd.	unknown	560.0K	¥1,475	+165.1%	¥826M ($5.3M)
2025-03-18	BUY	unknown	株式会社三津原興産 Kabushiki Kaisha Mitsuhara Kousan	unknown	3.6M	¥1,475	+165.1%	¥5.3B ($34.3M)
2025-03-18	BUY	unknown	合同会社マックスプランニング Max Planning LLC	unknown	2.2M	¥1,475	+165.1%	¥3.3B ($21.3M)
2025-03-18	BUY	Market Buy	合同会社三津原興産 Godo Kaisha Mitsuhara Kousan	unknown	3.6M	¥1,475	+165.1%	¥165M ($1.1M)
2025-03-18	SELL	unknown	合同会社三津原興産 Godo Kaisha Mitsuhara Kousan	unknown	0	¥1,475	-165.1%	¥5.3B ($34.2M)
2025-03-18	BUY	Market Buy	合同会社三津原興産 Godo Kaisha Mitsuhara Kousan	unknown	3.6M	¥1,475	+165.1%	¥165M ($1.1M)
2025-03-18	BUY	Market Buy	三津原陽子 Yoko Mitsuhara	unknown	800.0K	¥1,475	+165.1%	¥37M ($236K)
2025-03-18	SELL	unknown	有限会社マックスプランニング Max Planning Co., Ltd.	unknown	2.2M	¥1,475	-165.1%	¥496M ($3.2M)
2025-03-18	BUY	unknown	合同会社マックスプランニング Max Planning LLC	unknown	2.2M	¥1,475	+165.1%	¥3.3B ($21.3M)
2025-03-18	SELL	unknown	三津原陽子 Yoko Mitsuhara	strategic	800.0K	¥1,475	-165.1%	¥175M ($1.1M)
2025-03-18	BUY	Market Buy	合同会社マックスプランニング Max Planning LLC	strategic	2.2M	¥1,475	+165.1%	¥101M ($650K)

Showing the 50 most recent of 96 filings.

Frequently asked questions

Who has been buying NIHON CHOUZAI Co.,Ltd. stock?: 9 distinct investors have filed 32 disclosed large-shareholding filings in NIHON CHOUZAI Co.,Ltd. (3341), most recently on 2025-10-06. 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 NIHON CHOUZAI Co.,Ltd. have?: NIHON CHOUZAI Co.,Ltd. has 32 buy-side and 16 sell-side disclosures on record, covering ¥58.9B ($379.8M) in total reported value, spanning 2022-03-04 to 2025-10-06.
Where does StockDrifts get NIHON CHOUZAI 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 CHOUZAI Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.