Who has been buying Bitcoin Japan Corporation stock?

4 distinct investors have filed 3 disclosed large-shareholding filings in Bitcoin Japan Corporation (8105), most recently on 2026-02-18. 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 Bitcoin Japan Corporation have?

Bitcoin Japan Corporation has 3 buy-side and 26 sell-side disclosures on record, covering ¥10.3B ($66.4M) in total reported value, spanning 2025-05-29 to 2026-02-18.

Where does StockDrifts get Bitcoin Japan 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.

Bitcoin Japan Corporation 8105

Company

堀田丸正株式会社Bitcoin Japan Corporation

Investors

Buys

Total Value

¥10.3B ($66.4M)

Avg Return

+18.75%

Last Filing

2026-02-18

Bitcoin Japan Corporation (8105) has 3 disclosed large-shareholding filings and 26 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥10.3B ($66.4M) in reported transaction value. The earliest filing StockDrifts holds for Bitcoin Japan Corporation is dated 2025-05-29; the most recent is 2026-02-18. 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 +18.75%, 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
2026-08-13	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥94	-4.3%	-
2026-08-13	BUY	private	エボファンド Evo Fund	engagement	77.3M	¥94	-4.3%	¥107M ($692K)
2026-08-10	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥93	-3.2%	-
2026-08-10	BUY	private	エボファンド Evo Fund	engagement	72.2M	¥93	-3.2%	¥6.7B ($43.3M)
2026-06-12	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	1.3M	¥230	+39.6%	¥608M ($3.9M)
2026-06-05	SELL	unknown	バックト・オプコ・ホールディングス・エルエルシー(Bakkt Opco Holdings, LLC) Bakkt Opco Holdings, LLC	activist	16.9M	¥238	+40.3%	¥552M ($3.6M)
2026-06-05	BUY	unknown	バックト・オプコ・ホールディングス・エルエルシー(Bakkt Opco Holdings, LLC) Bakkt Opco Holdings, LLC	activist	16.9M	¥238	-40.3%	¥4.0B ($25.9M)
2026-06-05	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	3.9M	¥238	+40.3%	¥793M ($5.1M)
2026-02-18	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	7.4M	¥232	+31.5%	¥160M ($1.0M)
2026-02-12	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	8.1M	¥251	+36.6%	¥188M ($1.2M)
2026-02-03	SELL	acquisition	RIZAPグループ株式会社 RIZAP GROUP, Inc.	activist	3.1M	¥206	+22.8%	¥161M ($1.0M)
2026-01-21	SELL	acquisition	RIZAPグループ株式会社 RIZAP GROUP, Inc.	activist	3.9M	¥193	+17.6%	¥156M ($1.0M)
2026-01-20	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	8.9M	¥209	+23.9%	¥199M ($1.3M)
2026-01-14	SELL	acquisition	RIZAPグループ株式会社 RIZAP GROUP, Inc.	activist	4.7M	¥213	+25.4%	¥192M ($1.2M)
2026-01-13	SELL	acquisition	RIZAPグループ株式会社 RIZAP GROUP, Inc.	activist	5.6M	¥212	+25.0%	¥219M ($1.4M)
2026-01-13	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	10.0M	¥212	+25.0%	¥419M ($2.7M)
2026-01-09	BUY	unknown	バックト・オプコ・ホールディングス・エルエルシー(Bakkt Opco Holdings, LLC) Bakkt Opco Holdings, LLC	activist	16.9M	¥223	-28.7%	¥3.8B ($24.3M)
2026-01-09	BUY	unknown	バックト・オプコ・ホールディングス・エルエルシー(Bakkt Opco Holdings, LLC) Bakkt Opco Holdings, LLC	activist	16.9M	¥223	-28.7%	¥3.8B ($24.3M)
2026-01-09	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	12.2M	¥223	+28.7%	¥310M ($2.0M)
2026-01-08	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	13.8M	¥223	+28.7%	¥190M ($1.2M)
2026-01-07	SELL	acquisition	RIZAPグループ株式会社 RIZAP GROUP, Inc.	activist	6.3M	¥240	+33.8%	¥218M ($1.4M)
2026-01-07	SELL	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	14.9M	¥240	+33.8%	¥396M ($2.6M)
2025-12-19	BUY	Market Buy	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	16.9M	¥238	-33.2%	¥4.0B ($25.9M)
2025-12-18	BUY	unknown	バックト・オプコ・ホールディングス・エルエルシー(Bakkt Opco Holdings, LLC) Bakkt Opco Holdings, LLC	activist	16.9M	¥230	-30.9%	¥3.9B ($25.0M)
2025-12-18	BUY	unknown	バックト・オプコ・ホールディングス・エルエルシー(Bakkt Opco Holdings, LLC) Bakkt Opco Holdings, LLC	activist	16.9M	¥230	-30.9%	¥3.9B ($25.0M)
2025-12-17	SELL	acquisition	RIZAPグループ株式会社 RIZAP GROUP, Inc.	activist	7.2M	¥235	+32.3%	¥220M ($1.4M)
2025-12-05	SELL	acquisition	RIZAPグループ株式会社 RIZAP GROUP, Inc.	activist	8.1M	¥294	+45.9%	¥296M ($1.9M)
2025-12-03	SELL	acquisition	RIZAPグループ株式会社 RIZAP GROUP, Inc.	activist	9.1M	¥310	+48.7%	¥298M ($1.9M)
2025-12-02	SELL	acquisition	RIZAPグループ株式会社 RIZAP GROUP, Inc.	activist	10.1M	¥355	+55.2%	¥404M ($2.6M)
2025-11-28	SELL	acquisition	RIZAPグループ株式会社 RIZAP GROUP, Inc.	activist	11.2M	¥394	+59.6%	¥277M ($1.8M)
2025-11-27	SELL	acquisition	RIZAPグループ株式会社 RIZAP GROUP, Inc.	activist	11.9M	¥415	+61.7%	¥834M ($5.4M)
2025-11-26	SELL	acquisition	RIZAPグループ株式会社 RIZAP GROUP, Inc.	activist	14.0M	¥413	+61.5%	¥564M ($3.6M)
2025-11-17	SELL	acquisition	RIZAPグループ株式会社代表取締役社長瀬戸健 RIZAP GROUP, Inc. Takeshi Seto, Representative Director, President	activist	15.3M	¥524	+69.7%	¥8.8B ($57.0M)
2025-11-17	BUY	acquisition	RIZAPグループ株式会社代表取締役社長瀬戸健 RIZAP GROUP, Inc. Takeshi Seto, Representative Director, President	activist	15.3M	¥524	-69.7%	¥8.0B ($51.8M)
2025-08-12	BUY	acquisition	RIZAPグループ株式会社代表取締役社長瀬戸健 RIZAP GROUP, Inc. Takeshi Seto, Representative Director, President	activist	15.3M	¥305	-47.9%	¥5.1B ($33.2M)
2025-08-12	SELL	acquisition	RIZAPグループ株式会社代表取締役社長瀬戸健 RIZAP GROUP, Inc. Takeshi Seto, Representative Director, President	activist	15.3M	¥305	+47.9%	¥5.1B ($33.2M)
2025-08-12	BUY	unknown	バックト・オプコ・ホールディングス・エルエルシー(Bakkt Opco Holdings, LLC) Bakkt Opco Holdings, LLC	activist	16.9M	¥305	-47.9%	¥5.1B ($33.2M)
2025-07-31	BUY	acquisition	RIZAPグループ株式会社代表取締役社長瀬戸健 RIZAP GROUP, Inc. Takeshi Seto, Representative Director, President	activist	32.2M	¥53	+200.0%	¥1.7B ($11.0M)
2025-07-02	SELL	acquisition	RIZAPグループ株式会社代表取締役社長瀬戸健 RIZAP GROUP, Inc. Takeshi Seto, Representative Director, President	activist	32.2M	¥52	-205.8%	¥146M ($944K)
2025-07-02	BUY	acquisition	RIZAPグループ株式会社代表取締役社長瀬戸健 RIZAP GROUP, Inc. Takeshi Seto, Representative Director, President	activist	32.2M	¥52	+205.8%	¥1.7B ($10.8M)
2025-06-18	SELL	unknown	合同会社エンヴィー LLC ENVY	unknown	0	¥54	-194.4%	¥911M ($5.9M)
2025-06-18	SELL	acquisition	RIZAPグループ株式会社代表取締役社長瀬戸健 RIZAP GROUP, Inc. Takeshi Seto, Representative Director, President	activist	32.2M	¥54	-194.4%	¥152M ($981K)
2025-06-17	SELL	unknown	合同会社エンヴィー LLC ENVY	unknown	0	¥55	-189.1%	¥928M ($6.0M)
2025-06-17	BUY	unknown	合同会社エンヴィー LLC ENVY	unknown	0	¥55	+189.1%	¥928M ($6.0M)
2025-06-16	BUY	acquisition	RIZAPグループ株式会社代表取締役社長瀬戸健 RIZAP GROUP, Inc. Takeshi Seto, Representative Director, President	activist	32.2M	¥53	+200.0%	¥149M ($963K)
2025-06-16	SELL	acquisition	RIZAPグループ株式会社代表取締役社長瀬戸健 RIZAP GROUP, Inc. Takeshi Seto, Representative Director, President	activist	32.2M	¥53	-200.0%	¥149M ($963K)
2025-06-09	BUY	acquisition	RIZAPグループ株式会社代表取締役社長瀬戸健 RIZAP GROUP, Inc. Takeshi Seto, Representative Director, President	activist	35.0M	¥53	+200.0%	¥1.9B ($12.0M)
2025-05-30	BUY	acquisition	RIZAPグループ株式会社 RIZAP GROUP, Inc.	activist	35.0M	¥65	+144.6%	¥2.3B ($14.7M)
2025-05-29	BUY	negotiated	合同会社エンヴィー LLC ENVY	activist	16.9M	¥67	+137.3%	¥1.1B ($7.3M)

Frequently asked questions

Who has been buying Bitcoin Japan Corporation stock?: 4 distinct investors have filed 3 disclosed large-shareholding filings in Bitcoin Japan Corporation (8105), most recently on 2026-02-18. 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 Bitcoin Japan Corporation have?: Bitcoin Japan Corporation has 3 buy-side and 26 sell-side disclosures on record, covering ¥10.3B ($66.4M) in total reported value, spanning 2025-05-29 to 2026-02-18.
Where does StockDrifts get Bitcoin Japan 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 Bitcoin Japan Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.