Who has been buying TOKYO BASE Co.,Ltd. stock?

14 distinct investors have filed 25 disclosed large-shareholding filings in TOKYO BASE Co.,Ltd. (3415), most recently on 2026-04-22. 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 TOKYO BASE Co.,Ltd. have?

TOKYO BASE Co.,Ltd. has 25 buy-side and 61 sell-side disclosures on record, covering ¥5.5B ($35.5M) in total reported value, spanning 2021-05-12 to 2026-04-22.

Where does StockDrifts get TOKYO BASE 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.

TOKYO BASE Co.,Ltd. 3415

Company

株式会社ＴＯＫＹＯ　ＢＡＳＥTOKYO BASE Co.,Ltd.

Investors

Buys

Total Value

¥5.5B ($35.5M)

Avg Return

+28.40%

Last Filing

2026-04-22

TOKYO BASE Co.,Ltd. (3415) has 25 disclosed large-shareholding filings and 61 disclosed disposals on record, filed by 14 distinct investors. Together those filings cover ¥5.5B ($35.5M) in reported transaction value. The earliest filing StockDrifts holds for TOKYO BASE Co.,Ltd. is dated 2021-05-12; the most recent is 2026-04-22. 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 +28.40%, 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
2026-06-22	BUY	unknown	SMBC日興証券株式会社	other	318.1K	¥355	+12.7%	¥113M ($729K)
2026-06-22	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	2.2M	¥355	+12.7%	¥767M ($4.9M)
2026-05-22	SELL	unknown	ゴールドマン・サックス・インターナショナル(Goldman Sachs International) Goldman Sachs International	other	1.9M	¥371	+4.3%	¥271M ($1.7M)
2026-05-21	BUY	Market Buy	野村アセットマネジメント株式会社	other	1.6M	¥366	-6.3%	¥6M ($42K)
2026-05-21	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	231.1K	¥366	+6.3%	¥196M ($1.3M)
2026-04-22	BUY	unknown	ゴールドマン・サックス・インターナショナル(Goldman Sachs International) Goldman Sachs International	other	2.6M	¥424	-11.6%	¥1.1B ($7.1M)
2026-03-19	BUY	unknown	野村アセットマネジメント株式会社	other	1.6M	¥388	+13.9%	¥718M ($4.6M)
2026-03-19	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	770.9K	¥388	+13.9%	¥341M ($2.2M)
2026-02-06	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.9M	¥387	-14.2%	¥96M ($618K)
2025-12-11	SELL	negotiated	株式会社KT7	activist	475.0K	¥447	+1.1%	¥210M ($1.4M)
2025-12-11	SELL	negotiated	株式会社AT7	activist	475.0K	¥447	+1.1%	¥210M ($1.4M)
2025-12-11	SELL	negotiated	株式会社MT7	activist	3.2M	¥447	+1.1%	¥1.4B ($9.0M)
2025-12-11	SELL	negotiated	谷正人	activist	12.4M	¥447	+1.1%	¥5.5B ($35.4M)
2025-12-09	SELL	negotiated	株式会社KT7	activist	475.0K	¥443	+0.2%	¥210M ($1.4M)
2025-12-09	SELL	negotiated	株式会社AT7	activist	475.0K	¥443	+0.2%	¥210M ($1.4M)
2025-12-09	SELL	negotiated	株式会社MT7	activist	3.2M	¥443	+0.2%	¥1.4B ($9.0M)
2025-12-09	SELL	negotiated	谷正人	activist	12.4M	¥443	+0.2%	¥5.5B ($35.4M)
2025-12-09	SELL	negotiated	株式会社KT7	activist	475.0K	¥443	+0.2%	¥210M ($1.4M)
2025-12-09	SELL	negotiated	株式会社AT7	activist	475.0K	¥443	+0.2%	¥210M ($1.4M)
2025-12-09	SELL	negotiated	株式会社MT7	activist	3.2M	¥443	+0.2%	¥1.4B ($9.0M)
2025-12-09	SELL	negotiated	谷正人	activist	12.4M	¥443	+0.2%	¥5.5B ($35.4M)
2025-12-05	SELL	unknown	ゴールドマン・サックス・インターナショナル(Goldman Sachs International) Goldman Sachs International	other	1.9M	¥460	+3.9%	¥210M ($1.4M)
2025-12-05	BUY	unknown	野村アセットマネジメント株式会社	other	1.6M	¥460	-3.9%	¥709M ($4.6M)
2025-12-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	586.8K	¥460	-3.9%	¥259M ($1.7M)
2025-10-02	SELL	Market Buy	Founders Capital株式会社 Founders Capital Co., Ltd.	passive	477.7K	¥474	+6.8%	¥56M ($359K)
2025-10-02	SELL	Market Buy	中水英紀 HIDEKI NAKAMIZU	passive	1.5M	¥474	+6.8%	¥157M ($1.0M)
2025-09-05	BUY	unknown	ゴールドマン・サックス・インターナショナル(Goldman Sachs International) Goldman Sachs International	other	2.3M	¥540	-18.1%	¥1.3B ($8.1M)
2025-09-04	SELL	Market Buy	Founders Capital株式会社 Founders Capital Co., Ltd.	passive	595.3K	¥523	+15.5%	¥18M ($117K)
2025-09-04	SELL	Market Buy	Founders Capital株式会社 Founders Capital Co., Ltd.	passive	595.3K	¥523	+15.5%	¥18M ($117K)
2025-09-04	SELL	Market Buy	中水英紀 HIDEKI NAKAMIZU	passive	1.8M	¥523	+15.5%	¥236M ($1.5M)
2025-09-04	SELL	Market Buy	中水英紀 HIDEKI NAKAMIZU	passive	1.8M	¥523	+15.5%	¥236M ($1.5M)
2025-08-12	SELL	Market Buy	Founders Capital株式会社 Founders Capital Co., Ltd.	passive	628.3K	¥563	+21.5%	¥27M ($174K)
2025-08-12	SELL	Market Buy	中水英紀 HIDEKI NAKAMIZU	passive	2.3M	¥563	+21.5%	¥220M ($1.4M)
2025-07-31	SELL	Market Buy	Founders Capital株式会社 Founders Capital Co., Ltd.	passive	678.4K	¥487	+9.2%	¥129M ($833K)
2025-07-31	SELL	Market Buy	Founders Capital株式会社 Founders Capital Co., Ltd.	passive	944.1K	¥487	+9.2%	¥74M ($478K)
2025-07-31	SELL	Market Buy	中水英紀 HIDEKI NAKAMIZU	passive	2.9M	¥487	+9.2%	¥201M ($1.3M)
2025-07-31	SELL	Market Buy	中水英紀 HIDEKI NAKAMIZU	passive	2.7M	¥487	+9.2%	¥95M ($614K)
2025-07-23	SELL	Market Buy	Founders Capital株式会社 Founders Capital Co., Ltd.	passive	628.3K	¥465	+5.0%	¥146M ($939K)
2025-07-23	SELL	Market Buy	中水英紀 HIDEKI NAKAMIZU	passive	2.7M	¥465	+5.0%	¥91M ($587K)
2025-06-24	SELL	Market Buy	Founders Capital株式会社 Founders Capital Co., Ltd.	passive	944.1K	¥425	-4.0%	¥65M ($417K)
2025-06-24	SELL	Market Buy	中水英紀 HIDEKI NAKAMIZU	passive	2.9M	¥425	-4.0%	¥175M ($1.1M)
2025-06-20	SELL	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	117.8K	¥433	-2.1%	¥6M ($36K)
2025-06-20	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	passive	1.5M	¥433	-2.1%	¥256M ($1.7M)
2025-05-27	SELL	Market Buy	Founders Capital株式会社 Founders Capital Co., Ltd.	passive	1.1M	¥298	-48.3%	¥80M ($518K)
2025-05-27	BUY	Market Buy	中水英紀 HIDEKI NAKAMIZU	passive	3.6M	¥298	+48.3%	¥1.1B ($6.9M)
2025-05-27	SELL	Market Buy	中水英紀 HIDEKI NAKAMIZU	passive	3.3M	¥298	-48.3%	¥85M ($551K)
2025-05-27	BUY	Market Buy	Founders Capital株式会社 Founders Capital Co., Ltd.	passive	1.4M	¥298	+48.3%	¥407M ($2.6M)
2025-04-18	SELL	Market Buy	中水英紀 HIDEKI NAKAMIZU	passive	3.6M	¥255	-73.3%	¥123M ($794K)
2025-04-18	BUY	Market Buy	株式会社AAM AAM Co., Ltd.	passive	1.4M	¥255	+73.3%	¥348M ($2.2M)
2025-04-07	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	129.1K	¥221	+100.0%	¥29M ($184K)

Showing the 50 most recent of 108 filings.

Frequently asked questions

Who has been buying TOKYO BASE Co.,Ltd. stock?: 14 distinct investors have filed 25 disclosed large-shareholding filings in TOKYO BASE Co.,Ltd. (3415), most recently on 2026-04-22. 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 TOKYO BASE Co.,Ltd. have?: TOKYO BASE Co.,Ltd. has 25 buy-side and 61 sell-side disclosures on record, covering ¥5.5B ($35.5M) in total reported value, spanning 2021-05-12 to 2026-04-22.
Where does StockDrifts get TOKYO BASE 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 TOKYO BASE Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.