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Taiyo Kisokogyo Co.,Ltd. 1758

Company
太洋基礎工業株式会社Taiyo Kisokogyo Co.,Ltd.
Investors
3
Buys
3
Total Value
¥2.8B ($18.3M)
Avg Return
+34.97%
Last Filing
2025-11-25

Taiyo Kisokogyo Co.,Ltd. (1758) has 3 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥2.8B ($18.3M) in reported transaction value. The earliest filing StockDrifts holds for Taiyo Kisokogyo Co.,Ltd. is dated 2022-01-26; the most recent is 2025-11-25. 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 +34.97%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2025-11-25BUYunknown
太洋基礎工業取引先持株会 理事長 山崎 祐二
YUJI YAMASAKI
strategic124.5K¥2,245+11.6%¥280M ($1.8M)
2023-03-22SELLunknown
豊住 清
Toyozumi Kiyoshi
strategic189.2K¥2,090-19.9%¥121M ($782K)
2022-12-22SELLunknown
豊住 満 相続人代表 豊住 清
Toyozumi Mitsuru heir Representative Toyozumi Kiyoshi
unknown0¥1,766.66-41.9%¥418M ($2.7M)
2022-12-22BUYunknown
豊住 清
Toyozumi Kiyoshi
unknown247.2K¥1,766.66+41.9%¥437M ($2.8M)
2022-12-22BUYunknown
豊住 清
Toyozumi Kiyoshi
unknown247.2K¥1,766.66+41.9%¥437M ($2.8M)
2022-12-22BUYunknown
豊住 清
Toyozumi Kiyoshi
unknown247.2K¥1,766.66+41.9%¥437M ($2.8M)
2022-01-26BUYunknown
豊住 満
Toyozumi Mitsuru
strategic1.3M¥1,655+51.4%¥2.1B ($13.7M)
2022-01-26SELLunknown
豊住 満
Toyozumi Mitsuru
strategic236.5K¥1,655-51.4%¥33M ($211K)
2022-01-26BUYunknown
豊住 満
Toyozumi Mitsuru
strategic1.3M¥1,655+51.4%¥2.1B ($13.7M)
2022-01-26BUYunknown
豊住 満
Toyozumi Mitsuru
strategic236.5K¥1,655+51.4%¥33M ($211K)

Frequently asked questions

Who has been buying Taiyo Kisokogyo Co.,Ltd. stock?
3 distinct investors have filed 3 disclosed large-shareholding filings in Taiyo Kisokogyo Co.,Ltd. (1758), most recently on 2025-11-25. 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 Taiyo Kisokogyo Co.,Ltd. have?
Taiyo Kisokogyo Co.,Ltd. has 3 buy-side and 3 sell-side disclosures on record, covering ¥2.8B ($18.3M) in total reported value, spanning 2022-01-26 to 2025-11-25.
Where does StockDrifts get Taiyo Kisokogyo 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 Taiyo Kisokogyo Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.