Who has been buying Tomato Bank, Ltd. stock?

9 distinct investors have filed 5 disclosed large-shareholding filings in Tomato Bank, Ltd. (8542), most recently on 2025-08-22. 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 Tomato Bank, Ltd. have?

Tomato Bank, Ltd. has 5 buy-side and 14 sell-side disclosures on record, covering ¥735M ($4.7M) in total reported value, spanning 2021-12-14 to 2025-08-22.

Where does StockDrifts get Tomato Bank, 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.

Tomato Bank, Ltd. 8542

Company

株式会社トマト銀行Tomato Bank, Ltd.

Investors

Buys

Total Value

¥735M ($4.7M)

Avg Return

+47.48%

Last Filing

2025-08-22

Tomato Bank, Ltd. (8542) has 5 disclosed large-shareholding filings and 14 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥735M ($4.7M) in reported transaction value. The earliest filing StockDrifts holds for Tomato Bank, Ltd. is dated 2021-12-14; the most recent is 2025-08-22. 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 +47.48%, 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
2025-08-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	360.0K	¥1,437	+13.4%	¥517M ($3.3M)
2025-08-22	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	strategic	207.0K	¥1,437	-13.4%	¥215M ($1.4M)
2025-07-23	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	strategic	356.4K	¥1,305	-24.9%	¥261M ($1.7M)
2025-07-23	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	360.0K	¥1,305	+24.9%	¥470M ($3.0M)
2025-06-06	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	strategic	556.2K	¥1,200	+35.8%	¥667M ($4.3M)
2025-06-06	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	360.0K	¥1,200	+35.8%	¥432M ($2.8M)
2025-06-05	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.	unknown	0	¥1,197	-36.2%	¥7M ($45K)
2025-06-05	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	200.0K	¥1,197	+36.2%	¥239M ($1.5M)
2025-04-04	SELL	acquisition	預金保険機構 Deposit Insurance Corporation of Japan	other	531.4K	¥1,119	-45.7%	¥180M ($1.2M)
2024-11-07	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	584.0K	¥1,142	-42.7%	¥123M ($794K)
2024-11-07	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	12.5K	¥1,142	-42.7%	¥12M ($75K)
2024-11-07	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	200.0K	¥1,142	+42.7%	¥228M ($1.5M)
2024-09-05	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	23.1K	¥1,202	-35.6%	¥44M ($285K)
2024-09-05	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	691.8K	¥1,202	-35.6%	¥119M ($767K)
2024-09-05	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	200.0K	¥1,202	+35.6%	¥240M ($1.6M)
2023-08-04	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	200.0K	¥1,077	+51.4%	¥215M ($1.4M)
2023-08-04	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	59.9K	¥1,077	-51.4%	¥46M ($300K)
2023-08-04	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	791.3K	¥1,077	-51.4%	¥100M ($643K)
2023-01-12	SELL	acquisition	預金保険機構 Deposit Insurance Corporation of Japan	other	692.0K	¥1,028	-58.6%	¥119M ($765K)
2021-12-22	SELL	Market Buy	朝日生命保険相互会社 ASAHI MUTUAL LIFE INSURANCE CO.	passive	366.0K	¥1,057	-54.2%	¥521M ($3.4M)
2021-12-21	BUY	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	200.0K	¥1,050	+55.2%	¥68M ($438K)
2021-12-21	BUY	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	102.9K	¥1,050	+55.2%	¥61M ($395K)
2021-12-21	BUY	Market Buy	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	883.1K	¥1,050	+55.2%	¥325M ($2.1M)
2021-12-14	SELL	unknown	株式会社中国銀行 The Chugoku Bank, Limited.	other	439.0K	¥1,059	-53.9%	¥498M ($3.2M)
2021-12-14	SELL	negotiated	株式会社もみじ銀行 Momiji Bank,Ltd.	strategic	440.5K	¥1,059	-53.9%	¥498M ($3.2M)

Frequently asked questions

Who has been buying Tomato Bank, Ltd. stock?: 9 distinct investors have filed 5 disclosed large-shareholding filings in Tomato Bank, Ltd. (8542), most recently on 2025-08-22. 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 Tomato Bank, Ltd. have?: Tomato Bank, Ltd. has 5 buy-side and 14 sell-side disclosures on record, covering ¥735M ($4.7M) in total reported value, spanning 2021-12-14 to 2025-08-22.
Where does StockDrifts get Tomato Bank, 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 Tomato Bank, Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.