Who has been buying SystemSoft Corporation stock?

7 distinct investors have filed 5 disclosed large-shareholding filings in SystemSoft Corporation (7527), most recently on 2026-04-27. 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 SystemSoft Corporation have?

SystemSoft Corporation has 5 buy-side and 15 sell-side disclosures on record, covering ¥723M ($4.7M) in total reported value, spanning 2021-04-28 to 2026-04-27.

Where does StockDrifts get SystemSoft 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.

SystemSoft Corporation 7527

Company

株式会社システムソフトSystemSoft Corporation

Investors

Buys

Total Value

¥723M ($4.7M)

Avg Return

-16.23%

Last Filing

2026-04-27

SystemSoft Corporation (7527) has 5 disclosed large-shareholding filings and 15 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥723M ($4.7M) in reported transaction value. The earliest filing StockDrifts holds for SystemSoft Corporation is dated 2021-04-28; the most recent is 2026-04-27. 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 -16.23%, 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
2026-04-27	BUY	Market Buy	小林邦夫 Kobayashi Kunio	passive	11.7M	¥52	-1.9%	¥609M ($3.9M)
2026-04-24	BUY	private	EL CAMINO REAL株式会社代表取締役大村浩次 EL CAMINO REAL Co.,Ltd	strategic	21.3M	¥53	-3.8%	¥269M ($1.7M)
2026-02-05	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	3.2M	¥61	+8.2%	¥71M ($461K)
2025-12-19	BUY	unknown	野村アセットマネジメント株式会社	other	2.1M	¥63	+11.1%	¥120M ($776K)
2025-12-19	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	550.0K	¥63	+11.1%	¥31M ($199K)
2025-12-19	SELL	unknown	野村證券株式会社	other	1.7M	¥63	+11.1%	¥96M ($617K)
2025-11-10	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.8M	¥68	-17.6%	¥119M ($768K)
2025-11-10	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.1M	¥68	-17.6%	¥146M ($940K)
2025-11-10	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	804.4K	¥68	-17.6%	¥55M ($353K)
2025-10-08	BUY	negotiated	EL CAMINO REAL株式会社代表取締役大村浩次 EL CAMINO REAL Co.,Ltd	strategic	13.0M	¥75	-25.3%	¥974M ($6.3M)
2025-10-07	SELL	negotiated	Apaman Network株式会社 Apaman Network Co., Ltd.	other	0	¥78	+28.2%	¥335M ($2.2M)
2025-10-07	BUY	negotiated	APAMAN株式会社 APAMAN Co., Ltd.	strategic	13.0M	¥78	-28.2%	¥335M ($2.2M)
2025-08-19	SELL	negotiated	Apaman Network株式会社 Apaman Network Co., Ltd.	strategic	4.3M	¥63	+11.1%	¥482M ($3.1M)
2025-08-19	SELL	negotiated	APAMAN株式会社 APAMAN Co., Ltd.	strategic	8.7M	¥63	+11.1%	¥4M ($28K)
2022-08-12	BUY	negotiated	APAMAN株式会社 APAMAN Co., Ltd.	strategic	8.7M	¥106	-47.2%	¥921M ($5.9M)
2022-08-12	BUY	negotiated	Apaman Network株式会社 Apaman Network Co., Ltd.	strategic	11.9M	¥106	-47.2%	¥1.3B ($8.1M)
2021-10-05	SELL	negotiated	Apaman Network株式会社 Apaman Network Co., Ltd.	strategic	11.9M	¥144	+61.1%	¥646M ($4.2M)
2021-10-05	SELL	negotiated	APAMAN株式会社 APAMAN Co., Ltd.	strategic	8.7M	¥144	+61.1%	¥39M ($250K)
2021-09-22	BUY	negotiated	APAMAN株式会社 APAMAN Co., Ltd.	strategic	8.7M	¥164	-65.8%	¥1.4B ($9.2M)
2021-09-22	BUY	negotiated	APAMAN株式会社 APAMAN Co., Ltd.	strategic	8.7M	¥164	-65.8%	¥1.4B ($9.2M)
2021-09-22	SELL	negotiated	Apaman Network株式会社 Apaman Network Co., Ltd.	strategic	15.9M	¥164	+65.8%	¥656M ($4.2M)
2021-09-22	SELL	negotiated	Apaman Network株式会社 Apaman Network Co., Ltd.	strategic	15.9M	¥164	+65.8%	¥656M ($4.2M)
2021-09-15	BUY	negotiated	APAMAN株式会社 APAMAN Co., Ltd.	strategic	8.7M	¥181	-69.1%	¥1.6B ($10.2M)
2021-09-15	SELL	negotiated	Apaman Network株式会社 Apaman Network Co., Ltd.	strategic	19.9M	¥181	+69.1%	¥362M ($2.3M)
2021-09-15	SELL	negotiated	Apaman Network株式会社 Apaman Network Co., Ltd.	strategic	19.9M	¥181	+69.1%	¥362M ($2.3M)
2021-09-15	BUY	negotiated	APAMAN株式会社 APAMAN Co., Ltd.	strategic	8.7M	¥181	-69.1%	¥1.6B ($10.2M)
2021-08-12	BUY	negotiated	APAMAN株式会社 APAMAN Co., Ltd.	strategic	8.7M	¥207	-73.0%	¥1.8B ($11.6M)
2021-08-12	BUY	negotiated	APAMAN株式会社 APAMAN Co., Ltd.	strategic	8.7M	¥207	-73.0%	¥1.8B ($11.6M)
2021-08-12	SELL	negotiated	Apaman Network株式会社 Apaman Network Co., Ltd.	strategic	21.9M	¥207	+73.0%	¥414M ($2.7M)
2021-08-12	SELL	negotiated	大村浩次 Koji Omura	activist	3.6M	¥207	+73.0%	¥284M ($1.8M)
2021-08-12	BUY	negotiated	大村浩次 Koji Omura	activist	3.6M	¥207	-73.0%	¥284M ($1.8M)
2021-08-12	BUY	negotiated	大村浩次 Koji Omura	activist	3.6M	¥207	-73.0%	¥284M ($1.8M)
2021-08-12	SELL	negotiated	Apaman Network株式会社 Apaman Network Co., Ltd.	strategic	21.9M	¥207	+73.0%	¥414M ($2.7M)
2021-06-17	BUY	negotiated	大村浩次 Koji Omura	activist	5.1M	¥163	-65.6%	¥839M ($5.4M)
2021-05-07	BUY	negotiated	大村浩次 Koji Omura	activist	5.1M	¥161	-65.2%	¥829M ($5.3M)
2021-05-07	BUY	negotiated	大村浩次 Koji Omura	activist	5.1M	¥161	-65.2%	¥829M ($5.3M)
2021-04-28	BUY	negotiated	大村浩次 Koji Omura	activist	5.1M	¥160	-65.0%	¥824M ($5.3M)
2021-04-28	BUY	negotiated	大村浩次 Koji Omura	activist	5.1M	¥160	-65.0%	¥824M ($5.3M)

Frequently asked questions

Who has been buying SystemSoft Corporation stock?: 7 distinct investors have filed 5 disclosed large-shareholding filings in SystemSoft Corporation (7527), most recently on 2026-04-27. 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 SystemSoft Corporation have?: SystemSoft Corporation has 5 buy-side and 15 sell-side disclosures on record, covering ¥723M ($4.7M) in total reported value, spanning 2021-04-28 to 2026-04-27.
Where does StockDrifts get SystemSoft 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 SystemSoft Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.