Who has been buying New Japan Chemical Co., Ltd. stock?

8 distinct investors have filed 40 disclosed large-shareholding filings in New Japan Chemical Co., Ltd. (4406), most recently on 2026-04-23. 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 New Japan Chemical Co., Ltd. have?

New Japan Chemical Co., Ltd. has 40 buy-side and 20 sell-side disclosures on record, covering ¥3.5B ($22.8M) in total reported value, spanning 2021-05-11 to 2026-04-23.

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.

New Japan Chemical Co., Ltd. 4406

Company

新日本理化株式会社New Japan Chemical Co., Ltd.

Investors

Buys

Total Value

¥3.5B ($22.8M)

Avg Return

-15.95%

Last Filing

2026-04-23

New Japan Chemical Co., Ltd. (4406) has 40 disclosed large-shareholding filings and 20 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥3.5B ($22.8M) in reported transaction value. The earliest filing StockDrifts holds for New Japan Chemical Co., Ltd. is dated 2021-05-11; the most recent is 2026-04-23. Across these filings the average return since disclosure is -15.95%, 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
2026-09-11	SELL	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	5.1M	¥232	-1.3%	¥99M ($642K)
2026-04-23	SELL	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	5.5M	¥197	-19.3%	¥78M ($502K)
2026-03-26	SELL	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	5.9M	¥198	-18.7%	¥78M ($500K)
2026-03-06	SELL	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	6.3M	¥219	-7.3%	¥102M ($659K)
2026-02-27	SELL	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	6.7M	¥231	-1.7%	¥109M ($700K)
2026-02-20	SELL	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	7.2M	¥222	-5.9%	¥99M ($636K)
2026-02-10	SELL	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	7.6M	¥236	+0.4%	¥128M ($823K)
2026-01-29	SELL	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	8.2M	¥232	-1.3%	¥112M ($720K)
2025-10-31	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	8.7M	¥225	+4.4%	¥88M ($568K)
2025-08-12	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	8.3M	¥233	+0.9%	¥91M ($589K)
2025-07-31	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	7.9M	¥212	+10.8%	¥80M ($515K)
2025-07-11	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	7.5M	¥214	+9.8%	¥83M ($535K)
2025-07-04	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	7.1M	¥211	+11.4%	¥81M ($523K)
2025-06-30	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	6.7M	¥202	+16.3%	¥647M ($4.2M)
2025-06-30	SELL	Market Buy	株式会社YMCインベストメント YMC Investment Co., Ltd.	unknown	0	¥202	-16.3%	¥575M ($3.7M)
2025-04-15	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	3.5M	¥188	-	-
2025-04-15	BUY	Market Buy	株式会社YMCインベストメント YMC Investment Co., Ltd.	passive	2.9M	¥188	+25.0%	¥94M ($606K)
2025-04-10	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	3.5M	¥185	-	-
2025-04-10	BUY	Market Buy	株式会社YMCインベストメント YMC Investment Co., Ltd.	passive	2.4M	¥185	+27.0%	¥97M ($623K)
2025-03-24	BUY	negotiated	株式会社りそな銀行 Resona Bank, Limited.	strategic	1.9M	¥204	-	-
2025-03-24	SELL	negotiated	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	0	¥204	-15.2%	¥32M ($206K)
2025-03-24	SELL	negotiated	株式会社関西みらい銀行 Kansai Mirai Bank, Ltd.	other	0	¥204	-15.2%	¥66M ($427K)
2024-08-09	BUY	Market Buy	株式会社YMCインベストメント YMC Investment Co., Ltd.	passive	1.8M	¥191	+23.0%	¥116M ($749K)
2024-08-09	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	3.5M	¥191	-	-
2024-08-09	BUY	Market Buy	山村隆治 Ryuji Yamamura	passive	138.1K	¥191	-	-
2024-07-24	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	3.5M	¥214	-	-
2024-07-24	BUY	Market Buy	株式会社YMCインベストメント YMC Investment Co., Ltd.	passive	1.2M	¥214	+9.8%	¥83M ($535K)
2024-07-24	BUY	Market Buy	山村隆治 Ryuji Yamamura	passive	138.1K	¥214	-	-
2024-07-18	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	3.5M	¥221	-	-
2024-07-18	BUY	Market Buy	株式会社YMCインベストメント YMC Investment Co., Ltd.	passive	829.8K	¥221	+6.3%	¥108M ($696K)
2024-07-18	BUY	Market Buy	山村隆治 Ryuji Yamamura	passive	138.1K	¥221	-	-
2024-07-09	BUY	Market Buy	株式会社YMCインベストメント YMC Investment Co., Ltd.	passive	343.1K	¥206	+14.1%	¥38M ($248K)
2024-07-09	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	3.5M	¥206	+14.1%	¥51M ($327K)
2024-07-09	BUY	Market Buy	山村隆治 Ryuji Yamamura	passive	138.1K	¥206	-	¥28M ($184K)
2024-05-08	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	135.7K	¥176	-33.5%	¥29M ($186K)
2024-05-08	BUY	negotiated	株式会社りそな銀行 Resona Bank, Limited.	strategic	1.9M	¥176	-	-
2024-05-08	BUY	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	1.3M	¥176	+33.5%	¥233M ($1.5M)
2024-05-08	SELL	negotiated	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	156.6K	¥176	-33.5%	¥70M ($453K)
2024-05-08	BUY	negotiated	株式会社関西みらい銀行 Kansai Mirai Bank, Ltd.	strategic	324.7K	¥176	-	-
2023-07-21	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	1.7M	¥234	-0.4%	¥40M ($259K)
2023-07-21	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	296.6K	¥234	-0.4%	¥10M ($62K)
2023-03-06	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	1.9M	¥222	-5.9%	¥52M ($336K)
2023-03-06	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	338.6K	¥222	-5.9%	¥26M ($171K)
2022-10-27	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	3.3M	¥279	-15.8%	¥110M ($711K)
2022-10-27	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	3.3M	¥279	-15.8%	¥110M ($711K)
2022-10-27	BUY	Market Buy	株式会社YMCインベストメント YMC Investment Co., Ltd.	passive	158.1K	¥279	-	-
2022-10-27	BUY	Market Buy	株式会社YMCインベストメント YMC Investment Co., Ltd.	passive	158.1K	¥279	-	-
2022-10-18	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	2.9M	¥276	-14.9%	¥113M ($730K)
2022-10-18	BUY	Market Buy	株式会社ワイエムシィ YMC CO., LTD.	passive	2.9M	¥276	-14.9%	¥113M ($730K)
2022-10-18	BUY	Market Buy	株式会社YMCインベストメント YMC Investment Co., Ltd.	passive	158.1K	¥276	-	-

Showing the 50 most recent of 86 filings.

Frequently asked questions

Who has been buying New Japan Chemical Co., Ltd. stock?: 8 distinct investors have filed 40 disclosed large-shareholding filings in New Japan Chemical Co., Ltd. (4406), most recently on 2026-04-23. 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 New Japan Chemical Co., Ltd. have?: New Japan Chemical Co., Ltd. has 40 buy-side and 20 sell-side disclosures on record, covering ¥3.5B ($22.8M) in total reported value, spanning 2021-05-11 to 2026-04-23.
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.