Who has been buying Kuribayashi Steamship Co., Ltd. stock?

18 distinct investors have filed 21 disclosed large-shareholding filings in Kuribayashi Steamship Co., Ltd. (9171), most recently on 2026-04-06. 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 Kuribayashi Steamship Co., Ltd. have?

Kuribayashi Steamship Co., Ltd. has 21 buy-side and 4 sell-side disclosures on record, covering ¥2.8B ($18.2M) in total reported value, spanning 2022-05-18 to 2026-04-06.

Where does StockDrifts get Kuribayashi Steamship Co., 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.

Kuribayashi Steamship Co., Ltd. 9171

Company

栗林商船株式会社Kuribayashi Steamship Co., Ltd.

Investors

Buys

Total Value

¥2.8B ($18.2M)

Avg Return

+16.85%

Last Filing

2026-04-06

Kuribayashi Steamship Co., Ltd. (9171) has 21 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 18 distinct investors. Together those filings cover ¥2.8B ($18.2M) in reported transaction value. The earliest filing StockDrifts holds for Kuribayashi Steamship Co., Ltd. is dated 2022-05-18; the most recent is 2026-04-06. 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 +16.85%, 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
2026-06-26	SELL	negotiated	日本製紙株式会社 Nippon Paper Industries Co., Ltd.	strategic	409.5K	¥1,792	+3.9%	¥664M ($4.3M)
2026-04-06	SELL	unknown	三井住友海上火災保険株式会社 Mitsui Sumitomo Insurance Co.,Ltd.	other	385.6K	¥1,881	-0.4%	¥520M ($3.4M)
2026-04-03	SELL	unknown	東京海上日動火災保険株式会社 Tokio Marine & Nichido Fire Insurance Co., Ltd.	strategic	219.2K	¥1,871	-1.0%	¥829M ($5.4M)
2026-03-31	BUY	Market Buy	三ッ輪運輸株式会社 MITSUWA UNYU KABUSIKI KAISHA	passive	651.3K	¥1,819	+4.4%	¥1.2B ($7.6M)
2026-03-31	BUY	acquisition	三ッ輪運輸株式会社 MITSUWA UNYU KABUSIKI KAISHA	passive	651.3K	¥1,819	+4.4%	¥1.2B ($7.6M)
2026-03-30	BUY	negotiated	栗林海陸輸送株式会社	strategic	15.1K	¥1,754	+8.3%	¥27M ($171K)
2026-03-30	BUY	negotiated	栗林リソース株式会社	strategic	28.2K	¥1,754	+8.3%	¥49M ($319K)
2026-03-30	BUY	negotiated	栗林石油株式会社	strategic	37.8K	¥1,754	+8.3%	¥66M ($428K)
2026-03-30	BUY	negotiated	株式会社栗林商会	strategic	631.0K	¥1,754	+8.3%	¥1.1B ($7.1M)
2026-03-30	BUY	acquisition	栗林リソース株式会社	strategic	28.2K	¥1,754	+8.3%	¥49M ($319K)
2026-03-30	BUY	acquisition	栗林石油株式会社	strategic	37.8K	¥1,754	+8.3%	¥66M ($428K)
2026-03-30	BUY	acquisition	株式会社栗林商会	strategic	631.0K	¥1,754	+8.3%	¥1.1B ($7.1M)
2026-03-30	BUY	negotiated	室蘭埠頭株式会社	strategic	12.6K	¥1,754	+8.3%	¥22M ($143K)
2026-03-30	BUY	negotiated	室蘭マリン・サービス株式会社	strategic	1.0K	¥1,754	+8.3%	¥2M ($11K)
2026-03-30	BUY	negotiated	室蘭海陸通運株式会社	strategic	25.2K	¥1,754	+8.3%	¥44M ($285K)
2026-03-30	BUY	negotiated	苫小牧栗林運輸株式会社	strategic	38.4K	¥1,754	+8.3%	¥67M ($434K)
2026-03-30	BUY	acquisition	室蘭埠頭株式会社	strategic	12.6K	¥1,754	+8.3%	¥22M ($143K)
2026-03-30	BUY	acquisition	室蘭マリン・サービス株式会社	strategic	1.0K	¥1,754	+8.3%	¥2M ($11K)
2026-03-30	BUY	acquisition	室蘭海陸通運株式会社	strategic	25.2K	¥1,754	+8.3%	¥44M ($285K)
2026-03-30	BUY	acquisition	苫小牧栗林運輸株式会社	strategic	38.4K	¥1,754	+8.3%	¥67M ($434K)
2026-03-30	BUY	acquisition	栗林海陸輸送株式会社	strategic	15.1K	¥1,754	+8.3%	¥27M ($171K)
2026-03-06	BUY	unknown	みずほ信託銀行株式会社	other	419.1K	¥1,907	-0.5%	¥795M ($5.1M)
2026-03-06	BUY	unknown	株式会社みずほ銀行	strategic	444.0K	¥1,907	-0.5%	¥843M ($5.4M)
2026-03-05	SELL	unknown	三井住友海上火災保険株式会社 Mitsui Sumitomo Insurance Co.,Ltd.	other	663.0K	¥1,914	+0.8%	¥766M ($4.9M)
2024-06-07	BUY	unknown	栗林總子 Souko Kuribayashi	other	803.6K	¥908	+109.0%	¥695M ($4.5M)
2024-06-07	BUY	Market Buy	栗林株式会社 Kuribayashi Co., Ltd.	other	1.1M	¥908	+109.0%	¥1.0B ($6.7M)
2024-06-07	BUY	Market Buy	栗林敦子 Atsuko Kuribayashi	other	5.0K	¥908	+109.0%	¥5M ($29K)
2024-06-07	BUY	Market Buy	栗林宏吉 Kuribayashi Hiroyoshi	other	195.8K	¥908	+109.0%	¥112M ($724K)
2024-06-07	SELL	unknown	栗林定友(相続人代表栗林宏吉) Kuribayashi Sadatomo	other	0	¥908	-109.0%	¥8M ($50K)
2022-05-18	BUY	unknown	東京海上日動火災保険株式会社 Tokio Marine & Nichido Fire Insurance Co., Ltd.	strategic	662.1K	¥432	+339.4%	¥286M ($1.8M)
2022-05-18	BUY	unknown	東京海上日動火災保険株式会社 Tokio Marine & Nichido Fire Insurance Co., Ltd.	strategic	662.1K	¥432	+339.4%	¥286M ($1.8M)

Frequently asked questions

Who has been buying Kuribayashi Steamship Co., Ltd. stock?: 18 distinct investors have filed 21 disclosed large-shareholding filings in Kuribayashi Steamship Co., Ltd. (9171), most recently on 2026-04-06. 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 Kuribayashi Steamship Co., Ltd. have?: Kuribayashi Steamship Co., Ltd. has 21 buy-side and 4 sell-side disclosures on record, covering ¥2.8B ($18.2M) in total reported value, spanning 2022-05-18 to 2026-04-06.
Where does StockDrifts get Kuribayashi Steamship Co., 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 Kuribayashi Steamship Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.