光世証券株式会社 · THE KOSEI SECURITIES CO., LTD.
Ownership & governance
Executives 3Directors 6Avg age 61Avg tenure 14.4y
DT
Daisuke Tatsumi
President
Age 62Since 2000-05-31Profile →
+8
Executives3
Board of directors6
DT
Daisuke Tatsumi→
Director/Board Member
Age 62Since 1998-05-31
MY
Masaharu Yamamoto
Director/Board Member
Age 56Since 2008-05-31
MM
Masayuki Mori
Director/Board Member
Age 61Since 2020-05-31
TI
Takuya Ishikawa→
Director/Board Member
Age 63Since 2019-05-31
SM
Satoshi Murakata
Director/Board Member
Age 62Since 2020-05-31
TK
Tatsuji Kishimoto
Director/Board Member
——
Shareholders5
| Name | Stake | Shares |
|---|---|---|
| Tatsumi Yagura Co. | 19.99 % | 1,896,325 |
| Tatsumi Office Co. | 11.72 % | 1,111,500 |
| Tetsugaku No Michi Bunko Co. | 9.615 % | 912,100 |
| Daisuke Tatsumi | 5.697 % | 540,433 |
| Haruna Tatsumi | 3.152 % | 299,000 |
Catalog · 2026-07-09
Registry officers9
| Name | Role | Since | Shares |
|---|---|---|---|
| Takuya Ishikawa | Chief Administrative Officer | 2016-03-31 | - |
| Daisuke Tatsumi | President | 2000-05-31 | - |
| Masao Mukose | Investor Relations Contact | — | - |
| 山 本 將 晴 | 取締役 | 2008-06-01 | - |
| 岸 本 達 司 | 取締役 監査等委員 | 2025-06-01 | - |
| 巽 大 介 | 取締役社長(代表取締役) | 1997-12-01 | - |
| 村 形 聡 | 取締役 監査等委員 | 2009-06-01 | - |
| 森 正 行 | 取締役監査等委員 | 2012-06-01 | - |
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.