Japanese Companies Held by Activist Investors

Japanese listed companies for which at least one large shareholding or change report has been filed by an investor on our activist watchlist. Counts and dates reflect public filings only — a company staying on this list does not mean the investor still holds the position.

401 companies · as of latest filing: 2026-10-05

CompanyActivists on fileLatest filing date
DAIHO CORPORATION182212026-10-05
Infomart Corporation249222026-10-05
Fujibo Holdings,Inc.310412026-10-05
NORITAKE CO.,LIMITED533112026-10-05
YODOKO,Ltd.545112026-10-05
YELLOW HAT LTD.988212026-10-02
Syuppin Co.,Ltd.317932026-10-01
MIURA CO.,LTD.600512026-10-01
SHIBAURA MACHINE CO.,LTD.610412026-10-01
EXEDY Corporation727812026-10-01
The Ogaki Kyoritsu Bank,Ltd.836112026-10-01
NPC Incorporated625512026-09-30
Aoyama Zaisan Networks Company,Limited892932026-09-30
Sugimura Warehouse Co.,Ltd.930712026-09-30
AUCNET INC.396412026-09-29
KH Neochem Co.,Ltd.418932026-09-29
CE Holdings Co.,Ltd.432012026-09-29
SUMITOMO HEAVY INDUSTRIES,LTD.630212026-09-29
Keihanshin Building Co.,Ltd.881812026-09-29
SAWAI GROUP HOLDINGS Co.,Ltd.488712026-09-28
EBARA JITSUGYO CO.,LTD.632822026-09-28
M3,Inc.241312026-09-25
en Inc.484912026-09-24
Wacom Co.,Ltd.672722026-09-24
SOFT99corporation446412026-09-17
Foster Electric Company,Limited679422026-09-17
SMS CO.,LTD.217512026-09-16
KUSURI NO AOKI HOLDINGS CO.,LTD.354912026-09-16
GungHo Online Entertainment,Inc.376512026-09-16
SHARINGTECHNOLOGY.INC398912026-09-16
NIDEC CORPORATION659412026-09-16
ISB CORPORATION970212026-09-16
COMSYS Holdings Corporation172122026-09-15
NIPPN CORPORATION200112026-09-14
LIFENET INSURANCE COMPANY715732026-09-14
Tokyo Kiraboshi Financial Group,Inc.717312026-09-14
TOA ROAD CORPORATION188212026-09-11
MEDIKIT CO.,LTD.774912026-09-11
NICHIREI CORPORATION287112026-09-10
J.FRONT RETAILING Co.,Ltd.308612026-09-10
YAMADA HOLDINGS CO.,LTD.983112026-09-10
KOBAYASHI PHARMACEUTICAL CO.,LTD.496712026-09-09
Yasuda Logistics Corporation932422026-09-09
SUZUKEN CO.,LTD.998712026-09-09
NIKON CORPORATION773112026-09-07
SANYO SHOKAI LTD.801112026-09-07
ORO Co.,Ltd.398312026-09-04
Plus Alpha Consulting Co.,LTD.407112026-09-04
AIGAN CO.,LTD.985412026-09-04
A&D HOLON Holdings Company,Limited774512026-09-03
NIPPO LTD.991312026-09-03
MEDIPAL HOLDINGS CORPORATION745912026-09-02
Yamaha Motor Co.,Ltd.727212026-08-31
Kakaku.com,Inc.237112026-08-27
WAKAMOTO PHARMACEUTICAL CO.,LTD.451212026-08-27
Kawai Musical Instruments Manufacturing Co.,Ltd.795212026-08-26
Sanken Electric Co.,Ltd.670722026-08-25
Takihyo Co.,Ltd.998212026-08-25
KANTO DENKA KOGYO CO.,LTD.404712026-08-24
Mitsubishi Materials Corporation571112026-08-24
UACJ Corporation574112026-08-24
NORITZ CORPORATION594322026-08-24
YAGI & CO.,LTD.746012026-08-21
HAKUHODO DY HOLDINGS INCORPORATED243312026-08-20
AIN HOLDINGS INC.962712026-08-20
SANYO DENKI CO.,LTD.651612026-08-19
ValueCommerce Co.,Ltd.249112026-08-18
Nippon Chemical Industrial Co.,Ltd.409212026-08-18
DENTSU SOKEN INC.481212026-08-17
NASU DENKI-TEKKO CO.,LTD.592222026-08-17
IWAKI CO.,LTD.623712026-08-17
TADANO LTD.639512026-08-14
CASIO COMPUTER CO.,LTD.695222026-08-13
MEISEI INDUSTRIAL Co.,Ltd.197622026-08-12
Tokuyama Corporation404312026-08-12
AEON Financial Service Co.,Ltd.857012026-08-12
Japan Securities Finance Co.,Ltd.851122026-08-10
Timee,Inc.215A12026-08-07
SANKEI REAL ESTATE Inc.297212026-08-07
Denyo Co.,Ltd.651712026-08-07
Mitsubishi Paper Mills Limited386412026-08-05
Sumitomo Osaka Cement Co.,Ltd.523222026-08-05
株式会社アイ・グリッド・ソリューションズ603A12026-08-05
INTER ACTION Corporation772522026-08-04
Prestige International Inc.429012026-08-03
AIRMAN CORPORATION636412026-08-03
BroadBand Tower,Inc.377612026-07-31
THE PACK CORPORATION395022026-07-31
STELLA CHEMIFA CORPORATION410922026-07-31
Sekisui Jushi Corporation421222026-07-31
INTAGE HOLDINGS Inc.432622026-07-31
EIKEN CHEMICAL CO.,LTD.454932026-07-31
Bunka Shutter Co.,Ltd.593032026-07-31
NISSAN TOKYO SALES HOLDINGS CO.,LTD.829122026-07-31
FUJI KYUKO CO.,LTD.901022026-07-31
SENKO Group Holdings Co.,Ltd.906922026-07-31
Soken Chemical & Engineering Co.,Ltd.497212026-07-30
JAPAN PURE CHEMICAL CO.,LTD.497312026-07-29
NIKKON Holdings Co.,Ltd.907222026-07-29
HIRAKAWA HEWTECH CORP.582112026-07-28
FUJIKURA COMPOSITES Inc.512112026-07-27
Nippon Paper Industries Co.,Ltd.386312026-07-23
INES Corporation974222026-07-23
inspec Inc.665612026-07-22
KURABO INDUSTRIES LTD.310612026-07-21
TAKI CHEMICAL CO.,LTD.402512026-07-21
KOMATSU MATERE Co.,Ltd.358012026-07-16
DeNA Co.,Ltd.243212026-07-15
MACNICA HOLDINGS,INC.313212026-07-15
nms Holdings Corporation216212026-07-14
Tokyo Cosmos Electric Co.,Ltd.677212026-07-14
TOSEI CORPORATION892312026-07-13
Kyoto Financial Group,Inc.584412026-07-09
SEIBU HOLDINGS INC.902412026-07-09
NISHIO HOLDINGS CO.,LTD.969912026-07-09
GOLDCREST Co.,Ltd.887112026-07-07
Keikyu Corporation900612026-07-06
Money Forward,Inc.399412026-07-03
TOREX SEMICONDUCTOR LTD.661612026-07-03
NAGAWA CO.,Ltd966312026-07-02
Internet Initiative Japan Inc.377412026-07-01
eole Inc.233412026-06-30
TAKARA & COMPANY LTD.792112026-06-30
Monex Group,Inc.869812026-06-30
TEIKOKU ELECTRIC MFG. CO.,LTD.633322026-06-25
Ferrotec Corporation689022026-06-25
YCP Holdings (Global) Limited925712026-06-23
KADOKAWA CORPORATION946812026-06-23
AIR WATER INC.408822026-06-22
TSURUMI MANUFACTURING CO.,LTD.635112026-06-18
THE KINKI SHARYO CO.,LTD.712222026-06-17
RICOH COMPANY,LTD.775212026-06-15
MITSUI MATSUSHIMA HOLDINGS CO.,LTD.151812026-06-12
CAWACHI LIMITED266412026-06-10
uSonar Co.,Ltd.431A12026-06-10
Sanwa Holdings Corporation592912026-06-10
Daicel Corporation420212026-06-09
Kawasaki Kisen Kaisha,Ltd.910712026-06-09
Orient Corporation858512026-06-08
Alfresa Holdings Corporation278412026-06-05
Advanced Media,Inc.377312026-06-05
ALPS ALPINE CO.,LTD.677012026-06-04
TIEMCO LTD.750112026-06-03
Shinko Shoji Co.,Ltd.814112026-06-03
Datasection Inc.390512026-06-02
KONICA MINOLTA,INC.490212026-06-02
DOWA HOLDINGS CO.,LTD.571412026-06-02
MEITO CO.,LTD.220712026-05-27
Synchro Food Co.,Ltd.396332026-05-27
NIPPON KAYAKU CO.,LTD.427212026-05-27
IZUTSUYA CO.,LTD.826012026-05-26
ICOM INCORPORATED682012026-05-22
Pasona Group Inc.216812026-05-21
KPP GROUP HOLDINGS CO.,LTD.927412026-05-21
Kao Corporation445212026-05-20
YAMATO INTERNATIONAL INC.812712026-05-20
NIPPON EXPRESS HOLDINGS,INC.914712026-05-20
KANSAI PAINT CO.,LTD.461312026-05-19
Rengo Co.,Ltd.394112026-05-14
CALBEE,Inc.222912026-05-13
DIC Corporation463112026-05-13
TOKYO STEEL MANUFACTURING CO.,LTD.542312026-05-13
SUNCORPORATION673622026-05-13
HORIBA,Ltd.685612026-05-13
Aichi Financial Group,Inc.738912026-05-13
KOKUYO CO.,LTD.798412026-05-13
THE SHIGA BANK,LTD.836612026-05-13
The Hyakugo Bank,Ltd.836812026-05-13
Senshu Ikeda Holdings,Inc.871412026-05-13
eGuarantee,Inc.877122026-05-13
TAKARA HOLDINGS INC.253112026-05-12
Kanadevia Corporation700412026-05-12
ICHIKOH INDUSTRIES,LTD.724412026-05-12
DKK Co.,Ltd.670612026-05-11
KYB Corporation724212026-05-11
Human Technologies,Inc.562112026-05-08
Kumagai Gumi Co.,Ltd.186112026-05-01
NEOJAPAN Inc.392112026-05-01
SEPTENI HOLDINGS CO.,LTD.429312026-05-01
SUMIKEN MITSUI ROAD CO., LTD.177612026-04-28
OYO Corporation975512026-04-23
TEIJIN LIMITED340112026-04-21
Ichiyoshi Securities Co.,Ltd.862412026-04-21
Fuva Brain Limited392712026-04-16
YOMEISHU SEIZO CO.,LTD.254012026-04-15
FUJI MEDIA HOLDINGS,INC.467632026-04-15
TEIKOKU SEN-I Co.,Ltd.330222026-04-08
TAIYO HOLDINGS CO.,LTD.462612026-04-08
ASKA Pharmaceutical Holdings Co.,Ltd.488622026-04-08
Teikoku Tsushin Kogyo Co.,Ltd.676322026-04-08
Helios Techno Holding Co.,Ltd.692722026-04-08
MURAKAMI CORPORATION729222026-04-08
MEIKO TRANS CO.,LTD.935712026-04-08
Cyber Security Cloud,Inc.449312026-04-07
Tamron Co.,Ltd.774012026-04-07
Yamatane Corporation930512026-04-07
TAMAI STEAMSHIP CO.,LTD912712026-03-31
Hokuetsu Corporation386512026-03-30
ASIRO Inc.737812026-03-26
KITAGAWA SEIKI CO.,LTD.632712026-03-24
SAXA,Inc.667512026-03-16
Mercuria Holdings Co.,Ltd.734722026-03-16
MAX CO.,LTD.645412026-03-12
HOGY MEDICAL CO.,LTD.359322026-03-09
Takashimaya Company,Limited823312026-03-05
Japan Asia Investment Company,Limited851812026-03-05
MANDOM CORPORATION491722026-03-04
BUFFALO INC.667612026-03-04
NCD Co.,Ltd.478312026-03-03
SQUARE ENIX HOLDINGS CO.,LTD.968412026-03-03
Dai-ichi Life Holdings,Inc.875012026-02-27
Oriental Shiraishi Corporation178612026-02-26
Fudo Tetra Corporation181312026-02-26
OSAKA STEEL CO.,LTD.544922026-02-26
HEIWA REAL ESTATE CO.,LTD.880312026-02-26
BEAUTY GARAGE Inc.318012026-02-25
Inui Global Logistics Co.,Ltd.930822026-02-20
Anicom Holdings,Inc.871522026-02-16
Niterra Co.,Ltd.533412026-02-13
Japan System Techniques Co.,Ltd.432312026-02-12
DAIHATSU INFINEARTH MFG.CO.,LTD.602322026-02-06
JAPAN PULP AND PAPER COMPANY LIMITED803212026-02-06
Broadmedia Corporation434732026-02-04
RINNAI CORPORATION594722026-01-30
PACIFIC INDUSTRIAL CO.,LTD.725012026-01-30
DAITO TRUST CONSTRUCTION CO.,LTD.187812026-01-27
NITTO KOHKI CO.,LTD.615112026-01-23
ATSUGI CO.,LTD.352912026-01-20
DTS CORPORATION968212026-01-20
FUJITEC CO.,LTD.640612025-12-26
WAVELOCK HOLDINGS CO.,LTD.794012025-12-25
PACIFIC METALS CO.,LTD.554122025-12-22
Sumitomo Rubber Industries,Ltd.511012025-12-12
Maxell,Ltd.681012025-11-27
NITTOKU CO.,LTD.614512025-11-25
Stanley Electric Co.,Ltd.692312025-11-20
YOROZU CORPORATION729412025-11-20
MegaChips Corporation687512025-11-19
STAR MICRONICS CO.,LTD.771812025-11-19
Nippon Fine Chemical Co.,Ltd.436212025-11-14
KANAME KOGYO CO.,LTD.656612025-11-07
System D Inc.380412025-10-29
NAFCO Co.,Ltd.279012025-10-22
Maruzen Showa Unyu Co.,Ltd.906812025-10-22
NICHIREKI GROUP CO.,LTD.501112025-10-17
ZUIKO CORPORATION627912025-10-17
UNISOL Holdings Corporation712812025-10-17
TOPCON CORPORATION773232025-10-10
SANTEN PHARMACEUTICAL CO.,LTD.453612025-10-08
TOSOH CORPORATION404212025-10-02
DIGITAL HOLDINGS,INC.238922025-10-01
Digital Garage,Inc.481912025-09-30
Trend Micro Incorporated470412025-09-29
Vertex Corporation529012025-09-29
Sumitomo Mitsui Construction Co.,Ltd.182112025-09-26
Sata Construction Co.,Ltd.182612025-09-22
IRISO ELECTRONICS CO.,LTD.690812025-09-22
Ai Holdings Corporation307612025-09-19
MITSUI-SOKO HOLDINGS Co.,Ltd.930212025-09-12
RACCOON HOLDINGS,Inc.303112025-09-11
Wakita & Co.,LTD.812512025-08-29
CareNet,Inc.215012025-08-27
TOHO HOLDINGS CO.,LTD.812912025-08-27
Nihon Tokushu Toryo Co.,Ltd.461912025-08-25
Ezaki Glico Co.,Ltd.220622025-08-22
ULVAC, Inc.672812025-08-22
Suruga Bank Ltd.835812025-08-22
Daito Pharmaceutical Co.,Ltd.457712025-08-15
KONISHI CO.,LTD.495612025-08-05
Freund Corporation631212025-08-05
Valuence Holdings Inc.927012025-08-01
TSI HOLDINGS CO.,LTD.360812025-07-31
YAMATO CORPORATION196712025-07-30
With us Corporation969612025-07-29
EXEO Group,Inc.195112025-07-15
WIN-Partners Co.,Ltd.318312025-07-07
Nxera Pharma Co.,Ltd.456512025-06-25
KUREHA CORPORATION402312025-06-11
ID Holdings Corporation470912025-06-09
TSUKISHIMA HOLDINGS CO.,LTD.633212025-05-28
AICHI STEEL CORPORATION548212025-05-23
Nissha Co.,Ltd.791512025-05-23
K&O Energy Group Inc.166312025-05-22
BEENOS Inc.332822025-05-22
YOTAI REFRACTORIES CO.,LTD.535722025-05-21
NIHON KOHDEN CORPORATION684912025-05-21
RAKUMACHI,INC.603712025-05-13
PIOLAX,INC.598812025-04-14
Kurashicom Inc.711012025-04-11
Oji Holdings Corporation386112025-04-08
NIPPON SHOKUBAI CO.,LTD.411412025-03-28
MACROMILL, INC.397822025-03-26
Takachiho Co.,Ltd.822512025-03-26
Iida Group Holdings Co.,Ltd.329112025-03-21
DENTSU GROUP INC.432412025-03-21
CRE, Inc.345812025-03-19
Japan Property Management Center Co.,Ltd.327612025-02-26
FURUKAWA CO.,LTD.571512025-02-20
PROTO CORPORATION429812025-02-18
NS Solutions Corporation232712025-02-14
PeptiDream Inc.458712025-02-06
NEC Networks & System Integration Corporation197312025-01-27
SAPPORO HOLDINGS LIMITED250112025-01-23
TORII PHARMACEUTICAL CO., LTD.455112025-01-14
AGRO-KANESHO CO.,LTD.495512024-12-27
Alpha Group Inc.332212024-12-26
TOYO SECURITIES CO.,LTD.861412024-12-25
KYOKUTO KAIHATSU KOGYO CO.,LTD.722612024-12-09
KAKEN PHARMACEUTICAL CO.,LTD.452112024-11-26
Impress Holdings, Inc.947912024-11-18
TOHOKUSHINSHA FILM CORPORATION232912024-11-14
SEIREN CO.,LTD.356912024-11-14
WACOAL HOLDINGS CORP.359112024-11-14
MediciNova,Inc.487512024-11-14
Mercari,Inc.438512024-11-13
FUJI SOFT INCORPORATED974912024-11-12
TRANCOM CO., LTD.905822024-11-08
Techno Smart Corp.624612024-11-07
ISHIHARA CHEMICAL CO.,LTD.446212024-10-07
Restar Corporation315612024-10-04
NISSAN SHATAI CO.,LTD.722212024-09-27
ZEON CORPORATION420512024-09-06
Arisawa Mfg.Co.,Ltd.520812024-09-05
NISHIMATSUYA CHAIN Co.,Ltd.754512024-08-06
GOODSPEED. CO., LTD.767612024-07-31
DAIDOH LIMITED320522024-07-12
YAMAICHI ELECTRONICS CO.,LTD.694112024-07-05
Aozora Bank,Ltd.830412024-07-01
INFOCOM CORPORATION434812024-06-11
NCホールディングス623612024-06-10
EM SYSTEMS CO.,LTD.482012024-05-29
Roland DG Corporation678912024-05-22
AIZAWA SECURITIES GROUP CO.,LTD.870822024-05-13
NAIGAI CO.,LTD.801312024-05-08
JSR Corporation418512024-04-23
Dream Incubator Inc.431022024-04-22
YAIZU SUISANKAGAKU INDUSTRY CO.,LTD.281222024-04-02
Avex Inc.786012024-03-28
ACSL Ltd.623212024-03-26
マナベインテリアハーツ711312024-03-22
TSURUHA HOLDINGS INC.339112024-03-21
T&K TOKA CO.,LTD.463622024-03-13
Shin Maint Holdings Co.,Ltd.608612024-03-05
TERAOKA SEISAKUSHO CO.,LTD.498712024-03-04
Fabrica Holdings Co.,Ltd.419312024-02-21
El Camino Real Co.,Ltd.888912024-02-13
Glosel Co., Ltd.999512024-02-06
IJTT Co.,Ltd.731512024-01-29
シダックス483712024-01-16
Ryosan Company, Limited814012024-01-04
Techno Medica Co.,Ltd.667812023-12-22
IG Port,Inc.379112023-12-11
COSMO ENERGY HOLDINGS COMPANY,LIMITED502112023-12-08
TOA CORPORATION188512023-12-05
ITOCHU Techno-Solutions Corporation473912023-11-07
HAZAMA ANDO CORPORATION171912023-10-02
SBI Shinsei Bank,Limited830312023-09-28
TOSHIBA CORPORATION650222023-09-26
YMIRLINK,Inc.437212023-09-08
SAGAMI RUBBER INDUSTRIES CO.,LTD.519412023-09-01
ARCLAND SERVICE HOLDINGS CO.,LTD.308512023-08-29
MIYAJI ENGINEERING GROUP,INC.343112023-08-22
Property Data Bank,Inc.438912023-08-17
Chugoku Marine Paints,Ltd.461712023-08-15
SEIKITOKYU KOGYO CO.,LTD.189812023-08-07
JINS HOLDINGS Inc.304612023-07-13
TACHI-S CO.,LTD.723912023-07-10
ZENKOKU HOSHO Co.,Ltd.716412023-06-23
JAPAN MATERIAL Co.,Ltd.605512023-06-19
Hosiden Corporation680412023-05-23
ARCLANDS CORPORATION984212023-04-24
IHARA SCIENCE CORPORATION599922023-03-31
TOKYOTOKEIBA CO.,LTD.967212023-03-30
IWASAKI ELECTRIC CO., LTD.692412023-03-10
TriIs Incorporated484012023-02-21
JAFCO Group Co.,Ltd.859522023-02-20
Kyokuto Boeki Kaisha,Limited809312023-02-01
アイペットホールディングス733912023-01-17
UCHIDA YOKO CO.,LTD.805712022-12-26
Mitsuboshi Belting Ltd.519212022-12-09
Central Glass Co.,Ltd.404412022-11-29
Broadleaf Co.,Ltd.367312022-11-22
Credit Saison Co.,Ltd.825312022-10-18
Nisshinbo Holdings Inc.310512022-10-14
NIHON DENKEI CO.,LTD990812022-09-13
Fuji Oil Company, Ltd.501712022-08-19
UNIDEN HOLDINGS CORPORATION681512022-08-16
SANKYO SEIKO CO.,LTD.801812022-07-08
QB Net Holdings Co.,Ltd.657112022-06-16
ASANUMA CORPORATION185212022-05-23
Dexerials Corporation498012022-04-21
Amaze Co.,Ltd.607612022-04-06
TOYO CONSTRUCTION CO.,LTD.189012022-03-30
Sodick Co.,Ltd.614312022-03-22
DAIBIRU CORPORATION880612022-02-17
MESCO,Inc.173712022-02-03
Katakura Industries Co.,Ltd.300112021-12-27
Nishimatsu Construction Co.,Ltd.182012021-12-16
Saison Technology Co.,Ltd.964012021-11-24
Cocokarafine Group Co.,Ltd.309812021-09-21
SAKAIOVEX CO.,LTD.340812021-09-15

“Activists on file” counts distinct investors on our watchlist that have filed at least one large shareholding or change report for the company — it is not a current holder count. Once a stake drops to 5% or below, further changes may not be observable via EDINET. Source: EDINET (the Financial Services Agency’s electronic disclosure system), aggregated daily.