JOHNAN ACADEMIC PREPARATORY INSTITUTE, INC. · 株式会社城南進学研究社
Ownership & governance
Executives 5Directors 8Avg age 66Avg tenure 14.5y
KS
Katsumi Shimomura
Chief Executive Officer
Age 75Since 2016-02-29
+12
Executives5
KS
Katsumi Shimomura
Chief Executive Officer
Age 75Since 2016-02-29
YS
Yukihiro Sugiyama
Director of Finance/CFO
Age 65Since 2019-05-31
WH
Wakako Hattori
Chief Administrative Officer
——
KC
Katsuya Chishima
Chief Operating Officer
Age 54Since 2019-05-31
KI
Kenji Iizuka
Corporate Officer/Principal
——
Board of directors8
KS
Katsumi Shimomura
Director/Board Member
Age 75Since 1982-08-31
YS
Yukihiro Sugiyama
Director/Board Member
Age 65Since 2011-05-31
KC
Katsuya Chishima
Director/Board Member
Age 54Since 2011-05-31
YN
Yasuo Nishimura
Director/Board Member
Age 73Since 2015-05-31
TA
Tomoatsu Aso
Director/Board Member
Age 57Since 2017-05-31
KI
Kenji Iizuka
Director/Board Member
—Since 2026-06-25
WH
Wakako Hattori
Director/Board Member
—Since 2026-06-25
KM
Kazuto Miyamoto
Director/Board Member
Age 77Since 1984-03-31
Shareholders5
| Name | Stake | Shares |
|---|---|---|
| Shimomura Family | 30.1 % | 2,690,000 |
| JOHNAN ACADEMIC PREPARATORY INSTITUTE, INC. | 7.007 % | 626,300 |
| Katsumi Shimomura | 6.518 % | 582,608 |
| GAKKEN HOLDINGS CO., LTD. | 4.475 % | 400,000 |
| Yuri Shimomura | 4.24 % | 379,000 |
Catalog · 2026-07-09
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Street consensus
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Firm rows and rating mix from Yahoo Finance; mean target is Yahoo’s aggregate until OpenFilings derives consensus from broker rows.