Who has been buying Miratap Inc. stock?

10 distinct investors have filed 15 disclosed large-shareholding filings in Miratap Inc. (3187), most recently on 2026-05-12. 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 Miratap Inc. have?

Miratap Inc. has 15 buy-side and 43 sell-side disclosures on record, covering ¥3.6B ($23.2M) in total reported value, spanning 2021-04-05 to 2026-05-12.

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.

Miratap Inc. 3187

Company

株式会社ミラタップMiratap Inc.

Investors

Buys

Total Value

¥3.6B ($23.2M)

Avg Return

-40.97%

Last Filing

2026-05-12

Miratap Inc. (3187) has 15 disclosed large-shareholding filings and 43 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥3.6B ($23.2M) in reported transaction value. The earliest filing StockDrifts holds for Miratap Inc. is dated 2021-04-05; the most recent is 2026-05-12. Across these filings the average return since disclosure is -40.97%, 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
2026-05-12	SELL	unknown	テンパード・インベストメント・マネジメント・リミテッド(Tempered Investment Management LTD.) Tempered Investment Management LTD.	other	1.4M	¥234	-74.8%	¥48M ($312K)
2024-12-17	BUY	unknown	山根知子 Tomoko Yamane	strategic	405.0K	¥408	-	-
2024-12-17	BUY	unknown	山根知子 Tomoko Yamane	strategic	405.0K	¥408	-	-
2024-12-17	BUY	unknown	山根知子 Tomoko Yamane	strategic	405.0K	¥408	-	-
2024-12-17	BUY	unknown	山根太郎 Taro Yamane	strategic	2.3M	¥408	+0.3%	¥16M ($101K)
2024-12-17	SELL	unknown	山根良太 Ryota Yamane	strategic	2.1M	¥408	-0.3%	¥2M ($15K)
2024-12-17	SELL	unknown	山根アセット株式会社 Yamane Asset Co., Ltd.	strategic	850.0K	¥408	-0.3%	¥348M ($2.2M)
2024-12-17	SELL	unknown	株式会社ジェイアンドエルデザイン J&L Design Co., Ltd.	strategic	1.7M	¥408	-0.3%	¥2M ($10K)
2024-12-17	BUY	unknown	株式会社R ACTIVO R ACTIVO Co., Ltd.	strategic	850.0K	¥408	-	¥347M ($2.2M)
2024-12-17	BUY	unknown	山根太郎 Taro Yamane	strategic	2.3M	¥408	+0.3%	¥16M ($101K)
2024-12-17	SELL	unknown	山根良太 Ryota Yamane	strategic	2.1M	¥408	-0.3%	¥2M ($15K)
2024-12-17	SELL	unknown	山根アセット株式会社 Yamane Asset Co., Ltd.	strategic	850.0K	¥408	-0.3%	¥348M ($2.2M)
2024-12-17	SELL	unknown	株式会社ジェイアンドエルデザイン J&L Design Co., Ltd.	strategic	1.7M	¥408	-0.3%	¥2M ($10K)
2024-12-17	BUY	unknown	株式会社R ACTIVO R ACTIVO Co., Ltd.	strategic	850.0K	¥408	-	¥347M ($2.2M)
2024-12-17	SELL	unknown	株式会社ジェイアンドエルデザイン J&L Design Co., Ltd.	strategic	1.7M	¥408	-0.3%	¥2M ($10K)
2024-12-17	BUY	unknown	株式会社R ACTIVO R ACTIVO Co., Ltd.	strategic	850.0K	¥408	-	¥347M ($2.2M)
2024-12-17	BUY	unknown	山根太郎 Taro Yamane	strategic	2.3M	¥408	+0.3%	¥16M ($101K)
2024-12-17	SELL	unknown	山根良太 Ryota Yamane	strategic	2.1M	¥408	-0.3%	¥2M ($15K)
2024-12-17	SELL	unknown	山根アセット株式会社 Yamane Asset Co., Ltd.	strategic	850.0K	¥408	-0.3%	¥348M ($2.2M)
2024-02-21	BUY	Market Buy	テンパード・インベストメント・マネジメント・リミテッド(Tempered Investment Management LTD.) Tempered Investment Management LTD.	other	1.6M	¥461	-11.3%	¥91M ($588K)
2023-10-31	BUY	private	山根知子 Tomoko Yamane	strategic	405.0K	¥784	-	-
2023-10-31	BUY	private	山根知子 Tomoko Yamane	strategic	405.0K	¥784	-	-
2023-10-31	BUY	private	山根知子 Tomoko Yamane	strategic	405.0K	¥784	-	-
2023-10-31	BUY	private	山根太郎 Taro Yamane	strategic	2.3M	¥784	-	-
2023-10-31	BUY	private	山根アセット株式会社 Yamane Asset Co., Ltd.	strategic	1.7M	¥784	-	-
2023-10-31	BUY	private	株式会社ジェイアンドエルデザイン J&L Design Co., Ltd.	strategic	1.7M	¥784	-	-
2023-10-31	SELL	private	山根太郎 Taro Yamane	strategic	2.3M	¥784	+47.8%	¥2M ($10K)
2023-10-31	SELL	private	山根良太 Ryota Yamane	strategic	2.1M	¥784	+47.8%	¥2M ($10K)
2023-10-31	SELL	private	山根アセット株式会社 Yamane Asset Co., Ltd.	strategic	1.7M	¥784	+47.8%	¥2M ($10K)
2023-10-31	SELL	private	株式会社ジェイアンドエルデザイン J&L Design Co., Ltd.	strategic	1.7M	¥784	+47.8%	¥2M ($10K)
2023-10-31	SELL	private	山根良太 Ryota Yamane	strategic	2.1M	¥784	+47.8%	¥2M ($10K)
2023-10-31	SELL	private	山根アセット株式会社 Yamane Asset Co., Ltd.	strategic	1.7M	¥784	+47.8%	¥2M ($10K)
2023-10-31	SELL	private	株式会社ジェイアンドエルデザイン J&L Design Co., Ltd.	strategic	1.7M	¥784	+47.8%	¥2M ($10K)
2023-10-31	BUY	private	山根良太 Ryota Yamane	strategic	2.1M	¥784	-	-
2023-10-31	SELL	private	山根太郎 Taro Yamane	strategic	2.3M	¥784	+47.8%	¥2M ($10K)
2022-12-19	BUY	private	山根知子 Tomoko Yamane	strategic	405.0K	¥1,351	-	-
2022-12-19	BUY	private	山根太郎 Taro Yamane	strategic	2.3M	¥1,351	-	-
2022-12-19	BUY	private	山根良太 Ryota Yamane	strategic	2.1M	¥1,351	-	-
2022-12-19	BUY	private	山根アセット株式会社 Yamane Asset Co., Ltd.	strategic	1.7M	¥1,351	-	-
2022-12-19	BUY	private	株式会社ジェイアンドエルデザイン J&L Design Co., Ltd.	strategic	1.7M	¥1,351	-	-
2022-08-19	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	637.1K	¥950	-57.0%	¥597M ($3.8M)
2022-08-19	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	169.6K	¥950	+57.0%	¥18M ($117K)
2022-06-21	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	841.1K	¥803	+49.1%	¥57M ($367K)
2022-06-21	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	187.0K	¥803	-49.1%	¥55M ($358K)
2022-05-17	BUY	private	津﨑宏一 Koichi Tsuzaki	activist	1.2M	¥611	-33.1%	¥734M ($4.7M)
2022-05-17	SELL	private	山根知子 Tomoko Yamane	strategic	405.0K	¥611	+33.1%	¥1M ($8K)
2022-05-17	BUY	private	山根太郎 Taro Yamane	strategic	2.3M	¥611	-33.1%	¥288M ($1.9M)
2022-05-17	SELL	private	山根良太 Ryota Yamane	strategic	2.1M	¥611	+33.1%	¥5M ($30K)
2022-05-17	SELL	private	山根アセット株式会社 Yamane Asset Co., Ltd.	strategic	1.7M	¥611	+33.1%	¥5M ($30K)
2022-05-17	SELL	private	株式会社ジェイアンドエルデザイン J&L Design Co., Ltd.	strategic	1.7M	¥611	+33.1%	¥5M ($30K)

Showing the 50 most recent of 86 filings.

Frequently asked questions

Who has been buying Miratap Inc. stock?: 10 distinct investors have filed 15 disclosed large-shareholding filings in Miratap Inc. (3187), most recently on 2026-05-12. 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 Miratap Inc. have?: Miratap Inc. has 15 buy-side and 43 sell-side disclosures on record, covering ¥3.6B ($23.2M) in total reported value, spanning 2021-04-05 to 2026-05-12.
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.