Who has been buying Nippon Concept Corporation stock?

10 distinct investors have filed 8 disclosed large-shareholding filings in Nippon Concept Corporation (9386), most recently on 2025-08-22. 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 Concept Corporation have?

Nippon Concept Corporation has 8 buy-side and 10 sell-side disclosures on record, covering ¥32.4B ($208.7M) in total reported value, spanning 2021-04-01 to 2025-08-22.

Where does StockDrifts get Nippon Concept Corporation 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 Concept Corporation 9386

Company

日本コンセプト株式会社Nippon Concept Corporation

Investors

Buys

Total Value

¥32.4B ($208.7M)

Avg Return

+37.28%

Last Filing

2025-08-22

Nippon Concept Corporation (9386) has 8 disclosed large-shareholding filings and 10 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥32.4B ($208.7M) in reported transaction value. The earliest filing StockDrifts holds for Nippon Concept Corporation is dated 2021-04-01; the most recent is 2025-08-22. 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 +37.28%, 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
2025-08-22	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	222.9K	¥3,045	+0.2%	¥679M ($4.4M)
2025-08-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	161.8K	¥3,045	-0.2%	¥2.4B ($15.6M)
2025-08-20	SELL	unknown	松元孝義 Takayoshi Matsumoto	unknown	0	¥3,045	-0.2%	¥8.9B ($57.7M)
2025-08-20	BUY	acquisition	株式会社商船三井 Mitsui O.S.K. Lines, Ltd.	strategic	4.0M	¥3,045	+0.2%	¥12.2B ($79.0M)
2025-08-20	BUY	acquisition	株式会社M M Co., Ltd.	activist	8.1M	¥3,045	+0.2%	¥24.7B ($159.7M)
2025-07-23	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	222.8K	¥3,050	+0.0%	¥680M ($4.4M)
2025-07-23	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	955.9K	¥3,050	+0.0%	¥2.9B ($18.8M)
2025-07-07	BUY	acquisition	株式会社商船三井 Mitsui O.S.K. Lines, Ltd.	strategic	4.0M	¥3,045	+0.2%	¥12.2B ($79.0M)
2025-07-02	BUY	Market Buy	松元孝義 Takayoshi Matsumoto	strategic	2.9M	¥3,045	+0.2%	¥13M ($82K)
2025-07-02	SELL	unknown	松元孝義 Takayoshi Matsumoto	strategic	2.9M	¥3,045	-0.2%	¥524M ($3.4M)
2025-06-20	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	540.4K	¥2,142	-42.4%	¥342M ($2.2M)
2024-03-25	BUY	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	700.5K	¥1,822	+67.4%	¥1.3B ($8.2M)
2024-01-17	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	45.0K	¥1,684	+81.1%	¥12M ($75K)
2024-01-17	SELL	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	239.7K	¥1,684	-81.1%	¥100M ($648K)
2024-01-17	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	activist	286.6K	¥1,684	-81.1%	¥152M ($979K)
2023-12-08	SELL	unknown	山中康利 Yasutoshi Yamanaka	strategic	0	¥1,633	-86.8%	¥2.2B ($14.1M)
2023-11-08	BUY	Market Buy	株式会社商船三井 Mitsui O.S.K. Lines, Ltd.	strategic	4.0M	¥1,746	+74.7%	¥3.4B ($21.9M)
2023-11-08	BUY	Market Buy	山中康利 Yasutoshi Yamanaka	strategic	1.3M	¥1,746	+74.7%	¥2M ($16K)
2023-11-08	BUY	unknown	山中康利 Yasutoshi Yamanaka	strategic	1.3M	¥1,746	+74.7%	¥2M ($16K)
2022-12-22	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	553.4K	¥1,536	-98.6%	¥222M ($1.4M)
2021-04-01	SELL	unknown	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	activist	377.9K	¥1,730	-76.3%	¥67M ($433K)
2021-04-01	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	36.9K	¥1,730	-76.3%	¥173M ($1.1M)
2021-04-01	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	300.0K	¥1,730	+76.3%	¥519M ($3.3M)

Frequently asked questions

Who has been buying Nippon Concept Corporation stock?: 10 distinct investors have filed 8 disclosed large-shareholding filings in Nippon Concept Corporation (9386), most recently on 2025-08-22. 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 Concept Corporation have?: Nippon Concept Corporation has 8 buy-side and 10 sell-side disclosures on record, covering ¥32.4B ($208.7M) in total reported value, spanning 2021-04-01 to 2025-08-22.
Where does StockDrifts get Nippon Concept Corporation 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 Concept Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.