Who has been buying Bunka Shutter Co., Ltd. stock?

18 distinct investors have filed 60 disclosed large-shareholding filings in Bunka Shutter Co., Ltd. (5930), most recently on 2026-04-08. 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 Bunka Shutter Co., Ltd. have?

Bunka Shutter Co., Ltd. has 60 buy-side and 54 sell-side disclosures on record, covering ¥48.2B ($311.0M) in total reported value, spanning 2021-03-17 to 2026-04-08.

Where does StockDrifts get Bunka Shutter 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.

Bunka Shutter Co., Ltd. 5930

Company

文化シヤッター株式会社Bunka Shutter Co., Ltd.

Investors

Buys

Total Value

¥48.2B ($311.0M)

Avg Return

+44.68%

Last Filing

2026-04-08

Bunka Shutter Co., Ltd. (5930) has 60 disclosed large-shareholding filings and 54 disclosed disposals on record, filed by 18 distinct investors. Together those filings cover ¥48.2B ($311.0M) in reported transaction value. The earliest filing StockDrifts holds for Bunka Shutter Co., Ltd. is dated 2021-03-17; the most recent is 2026-04-08. 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 +44.68%, 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
2026-07-24	BUY	unknown	エヌエーブイエフ・セレクト・マスター・ファンド・エルピーFund LP) NAVF Select (Master	activist	1.2M	¥1,930	-4.3%	¥2.2B ($14.4M)
2026-07-24	SELL	negotiated	ダルトン・インベストメンツ・インク Dalton Investments, Inc.	activist	10.0M	¥1,930	+4.3%	¥2.2B ($14.2M)
2026-07-24	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥1,930	-4.3%	¥4.8B ($31.1M)
2026-07-24	SELL	negotiated	ダルトン・インベストメンツ・インク Dalton Investments, Inc.	activist	10.0M	¥1,930	+4.3%	¥2.2B ($14.2M)
2026-07-24	BUY	unknown	エヌエーブイエフ・セレクト・マスター・ファンド・エルピーFund LP) NAVF Select (Master	activist	1.2M	¥1,930	-4.3%	¥2.2B ($14.4M)
2026-07-24	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥1,930	-4.3%	¥4.8B ($31.1M)
2026-04-08	BUY	unknown	エヌエーブイエフ・セレクト・マスター・ファンド・エルピーFund LP) NAVF Select (Master	activist	1.2M	¥1,947	-5.3%	¥281M ($1.8M)
2026-04-08	BUY	unknown	ダルトン・インベストメンツ・インク(Dalton Investments	activist	11.2M	¥1,947	-5.3%	¥942M ($6.1M)
2026-04-08	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥1,947	-5.3%	¥4.9B ($31.4M)
2025-06-17	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	10.7M	¥2,302	-18.9%	¥1.6B ($10.6M)
2025-06-17	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	1.0M	¥2,302	-18.9%	¥33M ($214K)
2025-06-17	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥2,302	-18.9%	¥5.8B ($37.1M)
2025-05-08	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	10.0M	¥2,091	-10.7%	¥1.6B ($10.2M)
2025-05-08	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	1.0M	¥2,091	-10.7%	¥2.1B ($13.5M)
2025-05-08	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥2,091	-10.7%	¥5.2B ($33.7M)
2025-03-05	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	9.2M	¥1,876	-0.4%	¥1.4B ($8.7M)
2025-03-05	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	1.0M	¥1,876	-0.4%	¥1.9B ($12.1M)
2025-03-05	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥1,876	-0.4%	¥4.7B ($30.3M)
2025-01-10	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥1,840	+1.5%	¥4.6B ($29.7M)
2025-01-10	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	8.5M	¥1,840	+1.5%	¥438M ($2.8M)
2025-01-10	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	1.0M	¥1,840	+1.5%	¥1.8B ($11.9M)
2024-12-27	BUY	unknown	文化シヤッター関連企業持株会理事長遠藤幸一 Bunka Shutter Co., Ltd Affiliates' Stockholding	strategic	5.7M	¥1,881	-0.7%	¥10.8B ($69.4M)
2024-12-27	SELL	unknown	文化シヤッター関連企業持株会理事長根本武 Bunka Shutter Co., Ltd Affiliates' Stockholding	unknown	0	¥1,881	+0.7%	¥9.5B ($61.5M)
2024-12-27	BUY	Market Buy	文化シヤッター関連企業持株会理事長根本武 Bunka Shutter Co., Ltd Affiliates' Stockholding	strategic	5.1M	¥1,881	-0.7%	¥1.4B ($8.8M)
2024-12-27	BUY	unknown	文化シヤッター関連企業持株会理事長根本武 Bunka Shutter Co., Ltd Affiliates' Stockholding	strategic	4.3M	¥1,881	-0.7%	¥8.2B ($52.7M)
2024-11-19	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	8.3M	¥1,880	-0.6%	¥1.4B ($8.9M)
2024-11-19	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥1,880	-0.6%	¥4.7B ($30.3M)
2024-11-19	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	1.0M	¥1,880	-0.6%	¥1.9B ($12.1M)
2024-10-28	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	7.5M	¥1,792	+4.2%	¥1.3B ($8.5M)
2024-10-28	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	1.0M	¥1,792	+4.2%	¥1.8B ($11.6M)
2024-10-28	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥1,792	+4.2%	¥4.5B ($28.9M)
2024-09-24	BUY	unknown	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	6.8M	¥1,700	+9.9%	¥1.3B ($8.1M)
2024-09-24	BUY	unknown	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	1.0M	¥1,700	+9.9%	¥1.7B ($11.0M)
2024-09-24	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥1,700	+9.9%	¥4.3B ($27.4M)
2024-08-21	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	817.1K	¥1,700	-9.9%	¥331M ($2.1M)
2024-08-21	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	1.3M	¥1,700	-9.9%	¥712M ($4.6M)
2024-08-21	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	803.0K	¥1,700	-9.9%	¥221M ($1.4M)
2024-06-20	BUY	unknown	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	6.1M	¥1,754	+6.5%	¥3.2B ($20.5M)
2024-06-20	BUY	unknown	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	1.0M	¥1,754	+6.5%	¥1.8B ($11.3M)
2024-06-20	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥1,754	+6.5%	¥4.4B ($28.3M)
2024-06-11	BUY	unknown	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	4.2M	¥1,694	+10.3%	¥3.1B ($19.7M)
2024-06-11	BUY	unknown	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	1.0M	¥1,694	+10.3%	¥1.7B ($10.9M)
2024-06-11	SELL	Market Buy	株式会社ストラテジックキャピタル Strategic Capital, Inc.	activist	2.7M	¥1,694	-10.3%	¥3.4B ($21.8M)
2024-06-11	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥1,694	+10.3%	¥4.2B ($27.3M)
2024-05-22	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	2.4M	¥1,698	+10.0%	¥1.3B ($8.5M)
2024-05-22	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	1.0M	¥1,698	+10.0%	¥12M ($79K)
2024-05-22	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥1,698	+10.0%	¥12M ($79K)
2024-04-11	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	1.7M	¥1,727	+8.2%	¥1.2B ($7.7M)
2024-04-11	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	997.9K	¥1,727	+8.2%	¥12M ($80K)
2024-04-11	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	2.5M	¥1,727	+8.2%	¥62M ($402K)

Showing the 50 most recent of 167 filings.

Frequently asked questions

Who has been buying Bunka Shutter Co., Ltd. stock?: 18 distinct investors have filed 60 disclosed large-shareholding filings in Bunka Shutter Co., Ltd. (5930), most recently on 2026-04-08. 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 Bunka Shutter Co., Ltd. have?: Bunka Shutter Co., Ltd. has 60 buy-side and 54 sell-side disclosures on record, covering ¥48.2B ($311.0M) in total reported value, spanning 2021-03-17 to 2026-04-08.
Where does StockDrifts get Bunka Shutter 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 Bunka Shutter Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.