Who has been buying Nagahori Corporation stock?

8 distinct investors have filed 12 disclosed large-shareholding filings in Nagahori Corporation (8139), most recently on 2026-03-23. 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 Nagahori Corporation have?

Nagahori Corporation has 12 buy-side and 5 sell-side disclosures on record, covering ¥5.1B ($32.9M) in total reported value, spanning 2022-04-05 to 2026-03-23.

Where does StockDrifts get Nagahori 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.

Nagahori Corporation 8139

Company

株式会社ナガホリNagahori Corporation

Investors

Buys

Total Value

¥5.1B ($32.9M)

Avg Return

+188.20%

Last Filing

2026-03-23

Nagahori Corporation (8139) has 12 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥5.1B ($32.9M) in reported transaction value. The earliest filing StockDrifts holds for Nagahori Corporation is dated 2022-04-05; the most recent is 2026-03-23. 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 +188.20%, 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
2026-03-23	SELL	unknown	プラスワンホールディングス株式会社	activist	0	¥1,975	-15.0%	-
2026-03-23	BUY	unknown	リ・ジェネレーション株式会社	activist	1.8M	¥1,975	+15.0%	¥4.0B ($26.0M)
2025-10-10	BUY	unknown	プラスワンホールディングス株式会社 Plus One Holdings Co., Ltd.	activist	200.0K	¥1,652	+37.5%	¥330M ($2.1M)
2025-10-10	SELL	unknown	リ・ジェネレーション株式会社 Re-Generation Inc.	activist	1.6M	¥1,652	-37.5%	¥330M ($2.1M)
2025-03-28	BUY	Market Buy	リ・ジェネレーション株式会社 Re-Generation Inc.	activist	1.8M	¥1,376	+65.1%	¥141M ($908K)
2024-10-04	BUY	unknown	長堀クリエイト株式会社 Nagahori Create Co., Ltd.	activist	700.0K	¥1,500	+51.5%	¥1.1B ($6.8M)
2024-10-04	BUY	unknown	長堀慶太 Keita Nagahori	activist	525.2K	¥1,500	+51.5%	¥788M ($5.1M)
2024-09-30	BUY	unknown	長堀不二代 Fujiyo Nagahori	strategic	646.5K	¥1,440	+57.8%	¥394M ($2.5M)
2024-09-30	SELL	unknown	長堀守弘(相続人代表長堀慶太) Morihiro Nagahori (Heir Representative Keita Nagahori)	unknown	0	¥1,440	-57.8%	¥971M ($6.3M)
2024-09-30	BUY	unknown	有限会社エムエフ長堀 MF Nagahori Ltd.	activist	1.2M	¥1,440	+57.8%	¥1.7B ($11.0M)
2024-09-30	BUY	Market Buy	長堀クリエイト株式会社 Nagahori Create Co., Ltd.	activist	800.0K	¥1,440	+57.8%	¥145M ($935K)
2024-09-30	BUY	Market Buy	長堀慶太 Keita Nagahori	activist	825.2K	¥1,440	+57.8%	¥432M ($2.8M)
2022-11-29	SELL	Market Buy	布山高士 FUYAMA Takashi	passive	1.1M	¥965	-135.4%	¥180M ($1.2M)
2022-09-22	SELL	Market Buy	布山高士 FUYAMA Takashi	passive	1.3M	¥900	-152.4%	¥163M ($1.1M)
2022-04-15	BUY	Market Buy	布山高士 FUYAMA Takashi	passive	1.5M	¥600	+278.7%	¥109M ($701K)
2022-04-15	BUY	Market Buy	布山高士 FUYAMA Takashi	passive	1.5M	¥600	+278.7%	¥109M ($701K)
2022-04-15	BUY	Market Buy	リ・ジェネレーション株式会社 Re-Generation Inc.	activist	1.7M	¥600	+278.7%	¥138M ($890K)
2022-04-14	BUY	unknown	リ・ジェネレーション株式会社 Re-Generation Inc.	activist	1.2M	¥604	+276.2%	¥696M ($4.5M)
2022-04-14	BUY	Market Buy	リ・ジェネレーション株式会社 Re-Generation Inc.	activist	1.4M	¥604	+276.2%	¥174M ($1.1M)
2022-04-07	BUY	Market Buy	布山高士 FUYAMA Takashi	passive	1.3M	¥592	+283.8%	¥101M ($653K)
2022-04-07	BUY	Market Buy	布山高士 FUYAMA Takashi	passive	1.3M	¥592	+283.8%	¥101M ($653K)
2022-04-05	BUY	Market Buy	布山高志 FUYAMA Takashi	passive	961.2K	¥560	+305.7%	¥538M ($3.5M)
2022-04-05	BUY	Market Buy	布山高士 FUYAMA Takashi	passive	1.2M	¥560	+305.7%	¥109M ($703K)
2022-04-05	BUY	Market Buy	布山高志 FUYAMA Takashi	passive	961.2K	¥560	+305.7%	¥538M ($3.5M)

Frequently asked questions

Who has been buying Nagahori Corporation stock?: 8 distinct investors have filed 12 disclosed large-shareholding filings in Nagahori Corporation (8139), most recently on 2026-03-23. 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 Nagahori Corporation have?: Nagahori Corporation has 12 buy-side and 5 sell-side disclosures on record, covering ¥5.1B ($32.9M) in total reported value, spanning 2022-04-05 to 2026-03-23.
Where does StockDrifts get Nagahori 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 Nagahori Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.