Who has been buying Saizeriya Co.,Ltd. stock?

5 distinct investors have filed 2 disclosed large-shareholding filings in Saizeriya Co.,Ltd. (7581), 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 Saizeriya Co.,Ltd. have?

Saizeriya Co.,Ltd. has 2 buy-side and 6 sell-side disclosures on record, covering ¥2.0B ($13.1M) in total reported value, spanning 2023-02-07 to 2026-04-22.

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.

Saizeriya Co.,Ltd. 7581

Company

株式会社サイゼリヤSaizeriya Co.,Ltd.

Investors

Buys

Total Value

¥2.0B ($13.1M)

Avg Return

+65.83%

Last Filing

2026-04-22

Saizeriya Co.,Ltd. (7581) has 2 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥2.0B ($13.1M) in reported transaction value. The earliest filing StockDrifts holds for Saizeriya Co.,Ltd. is dated 2023-02-07; the most recent is 2026-04-22. Across these filings the average return since disclosure is +65.83%, 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
2026-04-22	SELL	unknown	正垣泰彦 Yasuhiko Shougaki	strategic	13.7M	¥5,100	-25.7%	¥2.7B ($17.2M)
2025-01-21	SELL	unknown	正垣泰彦 Yasuhiko Shougaki	strategic	14.2M	¥4,905	-30.7%	¥2.6B ($16.7M)
2024-05-08	SELL	unknown	正垣泰彦 Yasuhiko Shougaki	strategic	14.7M	¥5,370	-19.4%	¥2.8B ($18.1M)
2024-02-22	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	618.0K	¥4,960	-29.2%	¥104M ($669K)
2024-02-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	59.1K	¥4,960	-	¥293M ($1.9M)
2024-02-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.6M	¥4,960	-29.2%	¥2.6B ($16.9M)
2023-08-30	SELL	unknown	株式会社バベット Shogaki Takeshi	strategic	4.2M	¥4,465	-43.6%	¥1.1B ($7.2M)
2023-02-07	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	638.0K	¥3,190	+100.9%	¥2.0B ($13.1M)
2023-02-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	2.2M	¥3,190	+100.9%	¥6.9B ($44.8M)

Frequently asked questions

Who has been buying Saizeriya Co.,Ltd. stock?: 5 distinct investors have filed 2 disclosed large-shareholding filings in Saizeriya Co.,Ltd. (7581), 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 Saizeriya Co.,Ltd. have?: Saizeriya Co.,Ltd. has 2 buy-side and 6 sell-side disclosures on record, covering ¥2.0B ($13.1M) in total reported value, spanning 2023-02-07 to 2026-04-22.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.