Who has been buying Waseda Academy Co., Ltd. stock?

11 distinct investors have filed 9 disclosed large-shareholding filings in Waseda Academy Co., Ltd. (4718), most recently on 2026-05-15. 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 Waseda Academy Co., Ltd. have?

Waseda Academy Co., Ltd. has 9 buy-side and 3 sell-side disclosures on record, covering ¥6.4B ($41.6M) in total reported value, spanning 2021-06-10 to 2026-05-15.

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.

Waseda Academy Co., Ltd. 4718

Company

株式会社早稲田アカデミーWaseda Academy Co., Ltd.

Investors

Buys

Total Value

¥6.4B ($41.6M)

Avg Return

+77.91%

Last Filing

2026-05-15

Waseda Academy Co., Ltd. (4718) has 9 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 11 distinct investors. Together those filings cover ¥6.4B ($41.6M) in reported transaction value. The earliest filing StockDrifts holds for Waseda Academy Co., Ltd. is dated 2021-06-10; the most recent is 2026-05-15. Across these filings the average return since disclosure is +77.91%, 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
2026-08-06	SELL	unknown	福山産業株式会社 Fukuyama Sangyo Co., Ltd.	other	354.0K	¥2,364	-4.5%	¥1.4B ($9.2M)
2026-06-23	BUY	Market Buy	河端真一 shinichi kawabata	strategic	2.1M	¥2,315	+6.7%	¥445M ($2.9M)
2026-05-15	SELL	negotiated	英進館株式会社 EISHINKAN Co.,LTD	strategic	1.8M	¥2,172	-13.7%	¥557M ($3.6M)
2026-04-15	BUY	Market Buy	河端真一 shinichi kawabata	strategic	1.9M	¥2,004	+23.3%	¥381M ($2.5M)
2024-08-30	SELL	unknown	福山産業株式会社 Fukuyama Sangyo Co., Ltd.	other	954.0K	¥1,603	-54.1%	¥335M ($2.2M)
2024-06-03	BUY	unknown	福山産業株式会社 Fukuyama Sangyo Co., Ltd.	other	1.2M	¥1,552	+59.1%	¥1.8B ($11.5M)
2024-06-03	SELL	unknown	中国開発株式会社 China Development Co., Ltd.	unknown	0	¥1,552	-59.1%	¥924M ($6.0M)
2023-08-23	BUY	Market Buy	河端真一 shinichi kawabata	strategic	1.7M	¥1,355	+82.3%	¥258M ($1.7M)
2023-06-26	BUY	Market Buy	河端真一 shinichi kawabata	strategic	1.5M	¥1,331	+85.6%	¥256M ($1.6M)
2022-01-17	BUY	Market Buy	株式会社明光ネットワークジャパン MEIKO NETWORK JAPAN CO.,LTD.	passive	951.4K	¥1,038	+138.0%	¥988M ($6.4M)
2022-01-17	BUY	Market Buy	株式会社明光ネットワークジャパン MEIKO NETWORK JAPAN CO.,LTD.	passive	951.4K	¥1,038	-	¥988M ($6.4M)
2021-07-21	BUY	Market Buy	株式会社ナガセ Nagase Brothers Inc.	strategic	3.4M	¥912	+170.8%	¥189M ($1.2M)
2021-07-21	BUY	Market Buy	株式会社ナガセマネージメント Nagase Management Co., Ltd.	strategic	200	¥912	-	-
2021-07-21	BUY	Market Buy	株式会社四谷大塚 Yotsuya Otsuka Co., Ltd.	strategic	200	¥912	-	-
2021-07-21	BUY	Market Buy	株式会社四谷大塚出版 Yotsuya Otsuka Publishing Co., Ltd.	strategic	200	¥912	-	-
2021-07-21	BUY	Market Buy	株式会社東進育英舎 Toshin Ikueisha Co., Ltd.	strategic	200	¥912	-	-
2021-07-21	BUY	Market Buy	株式会社東進スクール Toshin School Co., Ltd.	strategic	200	¥912	-	-
2021-07-21	BUY	negotiated	株式会社ナガセマネージメント Nagase Management Co., Ltd.	strategic	200	¥912	-	-
2021-07-21	BUY	negotiated	株式会社四谷大塚 Yotsuya Otsuka Co., Ltd.	strategic	200	¥912	-	-
2021-07-21	BUY	negotiated	株式会社四谷大塚出版 Yotsuya Otsuka Publishing Co., Ltd.	strategic	200	¥912	-	-
2021-07-21	BUY	negotiated	株式会社ナガセ Nagase Brothers Inc.	strategic	3.4M	¥912	+170.8%	¥189M ($1.2M)
2021-07-21	BUY	negotiated	株式会社東進育英舎 Toshin Ikueisha Co., Ltd.	strategic	200	¥912	-	-
2021-07-21	BUY	negotiated	株式会社東進スクール Toshin School Co., Ltd.	strategic	200	¥912	-	-
2021-07-05	BUY	Market Buy	株式会社ナガセ Nagase Brothers Inc.	strategic	3.2M	¥934	+164.4%	¥185M ($1.2M)
2021-07-05	BUY	Market Buy	株式会社ナガセマネージメント Nagase Management Co., Ltd.	strategic	200	¥934	-	-
2021-07-05	BUY	Market Buy	株式会社四谷大塚出版 Yotsuya Otsuka Publishing Co., Ltd.	strategic	200	¥934	-	-
2021-07-05	BUY	Market Buy	株式会社東進育英舎 Toshin Ikueisha Co., Ltd.	strategic	200	¥934	-	-
2021-07-05	BUY	Market Buy	株式会社東進スクール Toshin School Co., Ltd.	strategic	200	¥934	-	-
2021-07-05	BUY	Market Buy	株式会社四谷大塚 Yotsuya Otsuka Co., Ltd.	strategic	200	¥934	-	-
2021-06-10	BUY	private	株式会社ナガセ Nagase Brothers Inc.	strategic	3.0M	¥913	+170.5%	¥2.7B ($17.6M)
2021-06-10	BUY	private	株式会社ナガセマネージメント Nagase Management Co., Ltd.	strategic	200	¥913	-	-
2021-06-10	BUY	private	株式会社四谷大塚 Yotsuya Otsuka Co., Ltd.	strategic	200	¥913	-	-
2021-06-10	BUY	private	株式会社四谷大塚出版 Yotsuya Otsuka Publishing Co., Ltd.	strategic	200	¥913	-	-
2021-06-10	BUY	private	株式会社東進育英舎 Toshin Ikueisha Co., Ltd.	strategic	200	¥913	-	-
2021-06-10	BUY	private	株式会社東進スクール Toshin School Co., Ltd.	strategic	200	¥913	-	-

Frequently asked questions

Who has been buying Waseda Academy Co., Ltd. stock?: 11 distinct investors have filed 9 disclosed large-shareholding filings in Waseda Academy Co., Ltd. (4718), most recently on 2026-05-15. 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 Waseda Academy Co., Ltd. have?: Waseda Academy Co., Ltd. has 9 buy-side and 3 sell-side disclosures on record, covering ¥6.4B ($41.6M) in total reported value, spanning 2021-06-10 to 2026-05-15.
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.