Companies/JP/7600

JAPAN MEDICAL DYNAMIC MARKETING, INC. · 株式会社 日本エム.ディ.エム

Ownership & governance

Executives 5Directors 9Avg age 61Avg tenure 4.6y
Toshiyuki Hironaka
Chief Executive Officer
Age 63Since 2026-03-31

Executives5

Toshiyuki Hironaka
Chief Executive Officer
Age 63Since 2026-03-31
Naoto Sawaki
Director of Finance/CFO
Age 63Since 2023-01-31
Yasuaki Hidaka
Corporate Officer/Principal
Age 55Since 2025-03-31
Shinji Munechika
Investor Relations Contact
—Since 2022-05-31
Yusuke Yoshida
Corporate Officer/Principal
—Since 2026-03-31

Board of directors9

Toshio Saburi
Director/Board Member
Age 77Since 2015-05-31
Toshiyuki Hironaka
Director/Board Member
Age 63Since 2009-07-31
Yasuaki Hidaka
Director/Board Member
Age 55Since 2020-05-31
Tomoyuki Okamura
Director/Board Member
Age 55Since 2022-05-31
Hideki Yokoyama
Director/Board Member
Age 66Since 2008-07-31
Furushima Hiromi
Director/Board Member
Age 55Since 2025-05-31
Yoshiaki Jitto
Director/Board Member
—Since 2026-06-18
Kazuko Hashimoto
Director/Board Member
—Since 2026-06-18

Shareholders5

NameStakeShares
MITSUI CHEMICALS, INC.
30 %
7,942,000
Takashi Watanabe
4.412 %
1,168,000
Yasuo Watanabe
3.822 %
1,012,000
Motohiro Shimazaki
3.373 %
893,000
Samarang LLP
1.621 %
429,300

Catalog · 2026-07-09

Registry officers9

NameRoleSinceShares
佐分 紀夫社外取締役2002-10-01-
古島 ひろみ社外取締役2025-06-01-
實藤 義明社外監査役2015-06-01-
岡村 友之社外取締役2022-06-01-
弘中 俊行代表取締役社長2006-12-01-
日高 康明取締役2020-06-01-
村上 元茂社外監査役2020-06-01-
横山 秀樹社外取締役2008-08-01-

Registry · as of 2026-03-31

Institutional (13F)

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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.

Peers