MK SEIKO CO., LTD.
Ownership & governance
Executives 5Directors 7Avg age 58Avg tenure 9.4y
SM
Shoichi Maruyama
President
Age 53Since 2012-02-29Profile →
+11
Executives5
Board of directors7
SM
Shoichi Maruyama→
Director/Board Member
Age 53Since 2010-05-31
YK
Yoshihiko Kutsukake→
Director/Board Member
Age 62Since 2016-05-31
YK
Yukiko Kamijo→
Director/Board Member
Age 57Since 2014-05-31
HI
Hideki Izumi→
Director/Board Member
Age 63Since 2016-05-31
KC
Kazuki Chiba→
Director/Board Member
Age 62Since 2019-05-31
RT
Rena Takizawa→
Director/Board Member
Age 38Since 2019-05-31
CK
Chiaki Koyama→
Director/Board Member
Age 58Since 2025-05-31
Shareholders5
| Name | Stake | Shares |
|---|---|---|
| MK SEIKO CO., LTD. | 10.7 % | 1,669,200 |
| Tokyo Small & Medium Business Invst & Consultation Co., Ltd. | 7.502 % | 1,170,000 |
| Haruyo Maruyama | 5.29 % | 825,000 |
| HACHIJUNI NAGANO BANK, LTD. | 4.449 % | 693,800 |
| MIZUHO FINANCIAL GROUP, INC. | 4.412 % | 688,000 |
Catalog · 2026-07-09
Registry officers12
| Name | Role | Since | Shares |
|---|---|---|---|
| Chiaki Koyama | Chief Administrative Officer | 2025-02-28 | - |
| Chiaki Koyama | Director/Board Member | 2025-05-31 | - |
| Hideki Izumi | Director/Board Member | 2016-05-31 | - |
| Kazuki Chiba | Director/Board Member | 2019-05-31 | - |
| Rena Takizawa | Director/Board Member | 2019-05-31 | - |
| Shoichi Maruyama | Director/Board Member | 2010-05-31 | - |
| Yoshihiko Kutsukake | Director/Board Member | 2016-05-31 | - |
| Yukiko Kamijo | Director/Board Member | 2014-05-31 | - |
Registry · as of 2026-07-09
Institutional (13F)
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Fund membership
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Street consensus
Consensus none
Firm rows and rating mix from Yahoo Finance; mean target is Yahoo’s aggregate until OpenFilings derives consensus from broker rows.