Who has been buying Kimura Chemical Plants Co., Ltd. stock?

6 distinct investors have filed 12 disclosed large-shareholding filings in Kimura Chemical Plants Co., Ltd. (6378), 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 Kimura Chemical Plants Co., Ltd. have?

Kimura Chemical Plants Co., Ltd. has 12 buy-side and 8 sell-side disclosures on record, covering ¥597M ($3.8M) in total reported value, spanning 2021-07-06 to 2026-04-06.

Where does StockDrifts get Kimura Chemical Plants 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.

Kimura Chemical Plants Co., Ltd. 6378

Company

木村化工機株式会社Kimura Chemical Plants Co., Ltd.

Investors

Buys

Total Value

¥597M ($3.8M)

Avg Return

+42.70%

Last Filing

2026-04-06

Kimura Chemical Plants Co., Ltd. (6378) has 12 disclosed large-shareholding filings and 8 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥597M ($3.8M) in reported transaction value. The earliest filing StockDrifts holds for Kimura Chemical Plants Co., Ltd. is dated 2021-07-06; 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 +42.70%, 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
2026-04-06	BUY	negotiated	三井住友信託銀行株式会社	strategic	600.0K	¥1,358	-4.7%	¥815M ($5.3M)
2026-04-06	BUY	negotiated	アモーヴァ・アセットマネジメント株式会社	other	225.1K	¥1,358	-4.7%	¥3M ($18K)
2026-04-06	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社	other	305.0K	¥1,358	+4.7%	¥59M ($379K)
2026-02-17	BUY	Market Buy	さくら損害保険株式会社	passive	45.4K	¥1,286	-5.4%	¥62M ($397K)
2026-02-17	SELL	Market Buy	光通信株式会社	passive	964.9K	¥1,286	-5.4%	¥1.3B ($8.4M)
2025-12-23	BUY	Market Buy	株式会社東京共同会計事務所 Tokyo Kyodo Accounting Office Co., Ltd.	other	1.3M	¥1,226	+10.6%	¥275M ($1.8M)
2025-12-17	BUY	unknown	株式会社東京共同会計事務所 Tokyo Kyodo Accounting Office Co., Ltd.	other	1.1M	¥1,218	+11.3%	¥1.3B ($8.3M)
2025-09-29	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	45.4K	¥1,001	+35.5%	¥45M ($293K)
2025-09-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.2M	¥1,001	+35.5%	¥196M ($1.3M)
2025-09-19	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	348.2K	¥1,043	-30.0%	¥77M ($499K)
2025-09-19	BUY	negotiated	アモーヴァ・アセットマネジメント株式会社 Amova Asset Management Co., Ltd.	other	221.7K	¥1,043	+30.0%	¥9M ($55K)
2025-09-19	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	600.0K	¥1,043	+30.0%	¥626M ($4.0M)
2025-07-08	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	45.4K	¥904	+50.0%	¥41M ($265K)
2025-07-08	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	985.1K	¥904	+50.0%	¥891M ($5.7M)
2023-06-06	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	214.4K	¥747	+81.5%	¥2M ($10K)
2023-06-06	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	422.3K	¥747	-81.5%	¥28M ($179K)
2023-06-06	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	600.0K	¥747	+81.5%	¥448M ($2.9M)
2023-02-06	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	212.8K	¥698	-94.3%	¥20M ($130K)
2023-02-06	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	600.0K	¥698	+94.3%	¥419M ($2.7M)
2023-02-06	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	459.7K	¥698	-94.3%	¥32M ($204K)
2022-03-04	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	241.7K	¥835	+62.4%	¥2M ($11K)
2022-03-04	BUY	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	505.0K	¥835	+62.4%	¥2M ($11K)
2022-03-04	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	600.0K	¥835	+62.4%	¥501M ($3.2M)
2021-12-21	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	600.0K	¥825	+64.4%	¥495M ($3.2M)
2021-12-21	BUY	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	501.8K	¥825	+64.4%	¥17M ($110K)
2021-12-21	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	239.4K	¥825	-64.4%	¥42M ($274K)
2021-07-06	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	290.2K	¥853	+59.0%	¥53M ($340K)
2021-07-06	SELL	unknown	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	482.6K	¥853	-59.0%	¥18M ($113K)
2021-07-06	BUY	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	600.0K	¥853	+59.0%	¥512M ($3.3M)

Frequently asked questions

Who has been buying Kimura Chemical Plants Co., Ltd. stock?: 6 distinct investors have filed 12 disclosed large-shareholding filings in Kimura Chemical Plants Co., Ltd. (6378), 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 Kimura Chemical Plants Co., Ltd. have?: Kimura Chemical Plants Co., Ltd. has 12 buy-side and 8 sell-side disclosures on record, covering ¥597M ($3.8M) in total reported value, spanning 2021-07-06 to 2026-04-06.
Where does StockDrifts get Kimura Chemical Plants 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 Kimura Chemical Plants Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.