Who has been buying Adventure Inc. stock?

4 distinct investors have filed 11 disclosed large-shareholding filings in Adventure Inc. (6030), most recently on 2025-12-05. 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 Adventure Inc. have?

Adventure Inc. has 11 buy-side and 17 sell-side disclosures on record, covering ¥30.7B ($198.1M) in total reported value, spanning 2021-09-16 to 2025-12-05.

Where does StockDrifts get Adventure Inc. 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.

Adventure Inc. 6030

Company

株式会社アドベンチャーAdventure Inc.

Investors

Buys

Total Value

¥30.7B ($198.1M)

Avg Return

-71.36%

Last Filing

2025-12-05

Adventure Inc. (6030) has 11 disclosed large-shareholding filings and 17 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥30.7B ($198.1M) in reported transaction value. The earliest filing StockDrifts holds for Adventure Inc. is dated 2021-09-16; the most recent is 2025-12-05. 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 -71.36%, 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
2026-06-16	BUY	Market Buy	株式会社中村	activist	85.0K	¥1,220	+19.5%	¥10M ($62K)
2026-06-16	BUY	Market Buy	中村俊一	other	5.0M	¥1,220	+19.5%	¥605M ($3.9M)
2025-12-05	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	326.3K	¥1,642	-3.5%	¥190M ($1.2M)
2025-10-22	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	98	¥2,714	+37.4%	¥35M ($224K)
2025-10-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	442.4K	¥2,714	+37.4%	¥197M ($1.3M)
2024-07-05	SELL	unknown	株式会社中村 Nakamura Co., Ltd.	activist	85.0K	¥4,640	+63.4%	¥67M ($430K)
2024-07-05	BUY	unknown	中村俊一 Shunichi Nakamura	other	5.0M	¥4,640	-63.4%	¥22.7B ($146.6M)
2024-02-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	12.3K	¥3,955	-57.0%	¥12M ($77K)
2024-02-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	485.6K	¥3,955	-57.0%	¥1.9B ($12.2M)
2023-10-06	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	8.7K	¥4,710	-63.9%	¥41M ($266K)
2023-10-06	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	573.8K	¥4,710	-63.9%	¥2.7B ($17.2M)
2023-06-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	664.3K	¥9,220	+81.6%	¥742M ($4.8M)
2022-08-22	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	742.5K	¥8,870	-80.8%	¥665M ($4.3M)
2022-04-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	667.3K	¥9,290	-81.7%	¥704M ($4.5M)
2022-04-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.5K	¥9,290	-81.7%	¥1.3B ($8.4M)
2022-03-23	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	592.1K	¥8,270	-79.4%	¥682M ($4.4M)
2022-03-23	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	9.9K	¥8,270	+79.4%	¥25M ($160K)
2022-03-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	509.3K	¥6,180	-72.5%	¥718M ($4.6M)
2022-03-07	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	13.1K	¥6,180	+72.5%	¥51M ($329K)
2022-01-21	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	393.0K	¥6,470	-73.7%	¥2.5B ($16.4M)
2022-01-21	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	20.9K	¥6,470	-73.7%	¥135M ($872K)
2021-12-20	SELL	unknown	株式会社中村 Nakamura Co., Ltd.	activist	85.0K	¥7,180	+76.3%	¥469M ($3.0M)
2021-12-20	BUY	unknown	中村俊一 Shunichi Nakamura	other	5.0M	¥7,180	-76.3%	¥35.5B ($229.3M)
2021-12-20	SELL	unknown	株式会社中村 Nakamura Co., Ltd.	activist	85.0K	¥7,180	+76.3%	¥469M ($3.0M)
2021-12-20	BUY	unknown	中村俊一 Shunichi Nakamura	other	5.0M	¥7,180	-76.3%	¥35.5B ($229.3M)
2021-09-30	SELL	unknown	株式会社中村 Nakamura Co., Ltd.	activist	150.0K	¥9,000	+81.1%	¥447M ($2.9M)
2021-09-30	SELL	unknown	株式会社中村 Nakamura Co., Ltd.	activist	150.0K	¥9,000	+81.1%	¥447M ($2.9M)
2021-09-30	SELL	unknown	中村俊一 Shunichi Nakamura	other	5.0M	¥9,000	+81.1%	¥324M ($2.1M)
2021-09-30	SELL	unknown	中村俊一 Shunichi Nakamura	other	5.0M	¥9,000	+81.1%	¥324M ($2.1M)
2021-09-16	SELL	unknown	株式会社中村 Nakamura Co., Ltd.	activist	180.0K	¥6,700	+74.6%	¥132M ($852K)
2021-09-16	SELL	unknown	株式会社中村 Nakamura Co., Ltd.	activist	180.0K	¥6,700	+74.6%	¥132M ($852K)
2021-09-16	SELL	unknown	中村俊一 Shunichi Nakamura	other	5.0M	¥6,700	+74.6%	¥241M ($1.6M)
2021-09-16	SELL	unknown	中村俊一 Shunichi Nakamura	other	5.0M	¥6,700	+74.6%	¥241M ($1.6M)

Frequently asked questions

Who has been buying Adventure Inc. stock?: 4 distinct investors have filed 11 disclosed large-shareholding filings in Adventure Inc. (6030), most recently on 2025-12-05. 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 Adventure Inc. have?: Adventure Inc. has 11 buy-side and 17 sell-side disclosures on record, covering ¥30.7B ($198.1M) in total reported value, spanning 2021-09-16 to 2025-12-05.
Where does StockDrifts get Adventure Inc. 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 Adventure Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.