Who has been buying Architects Studio Japan Inc. stock?

13 distinct investors have filed 14 disclosed large-shareholding filings in Architects Studio Japan Inc. (6085), most recently on 2025-12-04. 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 Architects Studio Japan Inc. have?

Architects Studio Japan Inc. has 14 buy-side and 19 sell-side disclosures on record, covering ¥936M ($6.0M) in total reported value, spanning 2021-09-06 to 2025-12-04.

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.

Architects Studio Japan Inc. 6085

Company

アーキテクツスタジオジャパン株式会社Architects Studio Japan Inc.

Investors

Buys

Total Value

¥936M ($6.0M)

Avg Return

+1579.79%

Last Filing

2025-12-04

Architects Studio Japan Inc. (6085) has 14 disclosed large-shareholding filings and 19 disclosed disposals on record, filed by 13 distinct investors. Together those filings cover ¥936M ($6.0M) in reported transaction value. The earliest filing StockDrifts holds for Architects Studio Japan Inc. is dated 2021-09-06; the most recent is 2025-12-04. Across these filings the average return since disclosure is +1579.79%, 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
2026-08-21	BUY	unknown	ベーア・ディミトリ―・フィリップ(BEHR DIMITRI PHILIP) BEHR DIMITRI PHILIP	other	27.1M	¥122	-	-
2026-08-03	SELL	Market Buy	株式会社T.MAKE itohiroshi	passive	952.5K	¥70	-77.1%	¥50M ($324K)
2026-08-03	SELL	Market Buy	株式会社T.MAKE itohiroshi	passive	580.0K	¥70	-77.1%	¥6M ($40K)
2026-08-03	BUY	subscription	株式会社T.MAKE itohiroshi	passive	580.0K	¥70	-	-
2025-12-04	SELL	unknown	ベーア・ディミトリ―・フィリップ(BEHR DIMITRI PHILIP) BEHR DIMITRI PHILIP	other	2.7M	¥350	+64.6%	¥51M ($332K)
2025-08-07	BUY	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	22.6K	¥276	-55.1%	¥222M ($1.4M)
2025-08-07	BUY	unknown	UBS Switzerland AG	other	469.4K	¥276	-55.1%	¥128M ($824K)
2025-07-07	BUY	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	15.5K	¥238	-47.9%	¥4M ($24K)
2025-07-07	BUY	unknown	UBS Switzerland AG	other	680.0K	¥238	-47.9%	¥162M ($1.0M)
2025-07-04	BUY	unknown	モルガン・スタンレー・アンド・カンパニー・インターナショナル・ピーエルシー Morgan Stanley & Co. International plc	other	17.4K	¥252	-50.8%	¥3M ($19K)
2025-07-04	SELL	unknown	モルガン・スタンレーMUFG証券株式会社 Morgan Stanley MUFG Securities Co., Ltd.	other	343.4K	¥252	+50.8%	¥59M ($379K)
2025-07-01	SELL	Market Buy	木下昭彦 AKIHIKO KINOSHITA	passive	536.3K	¥252	+50.8%	¥78M ($504K)
2025-06-19	BUY	unknown	モルガン・スタンレーMUFG証券株式会社 Morgan Stanley MUFG Securities Co., Ltd.	other	577.0K	¥265	-53.2%	¥153M ($986K)
2025-06-19	BUY	unknown	モルガン・スタンレー・アンド・カンパニー・インターナショナル・ピーエルシー Morgan Stanley & Co. International plc	other	6.0K	¥265	-53.2%	¥2M ($10K)
2025-05-22	SELL	Market Buy	木下昭彦 AKIHIKO KINOSHITA	passive	771.3K	¥260	+52.3%	¥32M ($207K)
2025-05-22	BUY	Market Buy	木下昭彦 AKIHIKO KINOSHITA	passive	771.3K	¥260	-	¥32M ($207K)
2025-05-19	BUY	Market Buy	木下昭彦 AKIHIKO KINOSHITA	passive	831.3K	¥209	-	¥56M ($359K)
2025-05-16	SELL	Market Buy	木下昭彦 AKIHIKO KINOSHITA	passive	831.3K	¥190	+34.7%	¥52M ($333K)
2025-05-15	BUY	unknown	木下昭彦 akihiko kinoshita	other	831.3K	¥180	-	-
2025-05-15	BUY	unknown	木下昭彦 akihiko kinoshita	other	831.3K	¥180	-	-
2025-05-07	BUY	unknown	ベーア・ディミトリ―・フィリップ(BEHR DIMITRI PHILIP) BEHR DIMITRI PHILIP	other	2.4M	¥184	-	¥34M ($217K)
2025-05-07	SELL	unknown	ベーア・ディミトリ―・フィリップ(BEHR DIMITRI PHILIP) BEHR DIMITRI PHILIP	other	2.4M	¥184	+32.6%	¥33M ($216K)
2025-05-02	SELL	unknown	Apaman Network株式会社代表取締役山崎戒 Apaman Network Co., Ltd.	unknown	0	¥180	+31.1%	¥385M ($2.5M)
2025-05-01	SELL	unknown	Apaman Network株式会社代表取締役山崎戒 Apaman Network Co., Ltd.	other	2.1M	¥184	+32.6%	¥16M ($102K)
2025-05-01	SELL	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	426.3K	¥184	+32.6%	¥38M ($247K)
2025-04-22	BUY	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	640.3K	¥169	-	-
2025-04-21	SELL	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	640.3K	¥165	+24.9%	¥54M ($350K)
2025-03-10	SELL	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	328.1K	¥153.67	+19.3%	¥6M ($36K)
2025-03-06	SELL	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	366.9K	¥159.67	+22.3%	¥7M ($43K)
2025-03-05	BUY	unknown	ベーア・ディミトリ―・フィリップ(BEHR DIMITRI PHILIP) BEHR DIMITRI PHILIP	other	807.2K	¥173.33	-28.5%	¥140M ($903K)
2025-03-05	SELL	unknown	Apaman Network株式会社代表取締役山崎戒 Apaman Network Co., Ltd.	other	712.2K	¥173.33	+28.5%	¥34M ($220K)
2025-03-05	SELL	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	411.3K	¥173.33	+28.5%	¥9M ($58K)
2025-03-05	BUY	unknown	Apaman Network株式会社代表取締役山崎戒 Apaman Network Co., Ltd.	other	712.2K	¥173.33	-	¥28M ($182K)
2025-03-05	SELL	unknown	株式会社ケイアイホールディングス代表取締役社長黒木博之 KEIAI HOLDINGS INC.	other	94.9K	¥173.33	+28.5%	¥13M ($84K)
2025-03-05	BUY	unknown	株式会社ケイアイホールディングス代表取締役社長黒木博之 KEIAI HOLDINGS INC.	other	94.9K	¥173.33	-	¥12M ($77K)
2024-11-01	BUY	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	466.9K	¥154	-19.5%	¥9M ($61K)
2024-08-05	SELL	Market Buy	中谷宅雄 Takuyoshi Nakatani	passive	147.5K	¥136	+8.8%	¥17M ($109K)
2024-05-21	BUY	Market Buy	株式会社T.MAKE itohiroshi	passive	650.0K	¥177	-29.9%	¥115M ($742K)
2024-04-02	BUY	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	400.0K	¥185.67	-33.2%	¥74M ($479K)
2023-09-06	BUY	Market Buy	木下昭彦 AKIHIKO KINOSHITA	passive	277.1K	¥228.33	-	¥18M ($118K)
2023-09-06	SELL	Market Buy	木下昭彦 AKIHIKO KINOSHITA	passive	277.1K	¥228.33	+45.7%	¥18M ($118K)
2022-08-12	BUY	unknown	Apaman Network株式会社代表取締役岩崎修一 Apaman Network Co., Ltd.	other	712.2K	¥196	-	-
2022-04-26	SELL	Market Buy	木下昭彦 AKIHIKO KINOSHITA	passive	357.1K	¥225	+44.9%	¥7M ($45K)
2022-04-26	BUY	Market Buy	木下昭彦 AKIHIKO KINOSHITA	passive	357.1K	¥225	-	¥51M ($328K)
2021-10-08	BUY	unknown	Apaman Network株式会社代表取締役岩崎修一 Apaman Network Co., Ltd.	other	712.2K	¥311.67	-60.2%	¥222M ($1.4M)
2021-09-06	BUY	unknown	株式会社ケイアイホールディングス代表取締役社長黒木博之 KEIAI HOLDINGS INC.	other	94.9K	¥350	-	¥33M ($214K)
2021-09-06	BUY	unknown	株式会社ケイアイホールディングス代表取締役社長黒木博之 KEIAI HOLDINGS INC.	other	94.9K	¥350	-64.6%	¥33M ($214K)
2021-09-06	SELL	unknown	株式会社ピュア・クリエイト Pure Create Co., Ltd.	activist	78.5K	¥350	+64.6%	¥2M ($12K)
2021-09-06	BUY	unknown	丸山雄平 Yuhei Maruyama	activist	373.6K	¥350	-64.6%	¥129M ($832K)

Frequently asked questions

Who has been buying Architects Studio Japan Inc. stock?: 13 distinct investors have filed 14 disclosed large-shareholding filings in Architects Studio Japan Inc. (6085), most recently on 2025-12-04. 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 Architects Studio Japan Inc. have?: Architects Studio Japan Inc. has 14 buy-side and 19 sell-side disclosures on record, covering ¥936M ($6.0M) in total reported value, spanning 2021-09-06 to 2025-12-04.
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.