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Nihon Office Automation Research Co., Ltd. 5241

Company
株式会社日本オーエー研究所Nihon Office Automation Research Co., Ltd.
Investors
6
Buys
12
Total Value
¥325M ($2.1M)
Avg Return
+1.24%
Last Filing
2026-04-08

Nihon Office Automation Research Co., Ltd. (5241) has 12 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥325M ($2.1M) in reported transaction value. The earliest filing StockDrifts holds for Nihon Office Automation Research Co., Ltd. is dated 2024-12-25; the most recent is 2026-04-08. Across these filings the average return since disclosure is +1.24%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-08-07BUYMarket Buy
株式会社UH6
passive12.0K¥500--
2026-08-07BUYMarket Buy
光通信株式会社
passive121.6K¥500--
2026-08-07BUYMarket Buy
株式会社UH Partners 2
passive65.3K¥500+0.0%¥8M ($53K)
2026-06-24BUYunknown
奥山 宏昭
HIROAKI OKUYAMA
other817.4K¥500-¥55M ($355K)
2026-06-24BUYunknown
奥山 宏昭
HIROAKI OKUYAMA
other817.4K¥500+0.0%¥55M ($355K)
2026-04-08BUYMarket Buy
光通信株式会社
passive121.6K¥500--
2026-04-08BUYMarket Buy
株式会社UH Partners 2
passive48.8K¥500+0.0%¥8M ($52K)
2026-04-08SELLMarket Buy
株式会社UH5
unknown0¥500+0.0%¥6M ($39K)
2026-04-08BUYMarket Buy
株式会社UH6
passive12.0K¥500-¥6M ($39K)
2026-02-02BUYMarket Buy
光通信株式会社
passive121.6K¥500--
2026-02-02BUYMarket Buy
株式会社UH Partners 2
passive32.6K¥500+0.0%¥8M ($53K)
2026-02-02BUYMarket Buy
株式会社UH5
passive12.0K¥500--
2025-12-16BUYMarket Buy
株式会社UH5
passive6.0K¥500--
2025-12-16BUYMarket Buy
光通信株式会社
passive60.8K¥500--
2025-12-16BUYMarket Buy
株式会社UH Partners 2
passive8.1K¥500-¥4M ($26K)
2025-11-13BUYMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive60.8K¥500+0.0%¥4M ($26K)
2025-11-13BUYMarket Buy
株式会社UH5
UH5 Co., Ltd.
passive6.0K¥500--
2025-10-27BUYMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive52.6K¥500+0.0%¥2M ($12K)
2025-10-27BUYMarket Buy
株式会社UH5
UH5 Co., Ltd.
passive6.0K¥500+0.0%¥2M ($15K)
2025-09-29BUYMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive49.0K¥500+0.0%¥3M ($22K)
2025-09-29BUYMarket Buy
株式会社UH5
UH5 Co., Ltd.
passive1.3K¥500+0.0%¥643K ($4K)
2025-09-02BUYMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive42.2K¥500+0.0%¥21M ($136K)
2024-12-25BUYMarket Buy
奥山伸子
NOBUKO OKUYAMA
passive98.0K¥482+3.7%¥47M ($305K)
2024-12-25BUYunknown
奥山 宏昭
HIROAKI OKUYAMA
activist463.7K¥482+3.7%¥224M ($1.4M)
2024-12-25BUYnegotiated
奥山 宏昭
HIROAKI OKUYAMA
activist463.7K¥482-¥224M ($1.4M)
2024-12-25BUYnegotiated
奥山 宏昭
HIROAKI OKUYAMA
activist463.7K¥482+3.7%¥224M ($1.4M)
2024-12-25BUYMarket Buy
奥山 伸子
NOBUKO OKUYAMA
passive98.0K¥482+3.7%¥47M ($305K)
2024-12-25BUYMarket Buy
奥山 伸子
NOBUKO OKUYAMA
passive98.0K¥482-¥47M ($305K)

Frequently asked questions

Who has been buying Nihon Office Automation Research Co., Ltd. stock?
6 distinct investors have filed 12 disclosed large-shareholding filings in Nihon Office Automation Research Co., Ltd. (5241), most recently on 2026-04-08. 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 Nihon Office Automation Research Co., Ltd. have?
Nihon Office Automation Research Co., Ltd. has 12 buy-side and 1 sell-side disclosures on record, covering ¥325M ($2.1M) in total reported value, spanning 2024-12-25 to 2026-04-08.
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.