Medical System Network Co., Ltd.
Medical System Network Co., Ltd. is a Private limited company (Ltd.) registered in Japan under 6430001025872, and its current status with National Tax Agency — Corporate Number Publication Site is active. The company was incorporated on 5 October 2015 and lists its registered address as Chuo Ward, Sapporo City, Japan. 5 shareholders are on record for Medical System Network Co., Ltd., and since every one of them is a company rather than an individual, this particular filing does not on its own establish an ultimate beneficial owner (UBO) — identifying one would mean tracing the ownership of each shareholding company in turn. This profile is sourced directly from National Tax Agency — Corporate Number Publication Site and was last updated on 28 September 2026.
- Company fundamentals
- Corporate linkage & group structures
- Digitized company financials
- Firmographics — websites, social profiles, revenue and employee estimates
Shareholders
5
Shareholders of Medical System Network Co., Ltd.
Five shareholders are currently on record for Medical System Network Co., Ltd., reflecting the kabunushi meibo (shareholder register) maintained under Articles 121-122 of the Companies Act rather than a public filing. The largest of these is DFA International Core Equity Portfolio, holding 36.3% — the largest recorded stake — followed by DFA International Vector Equity Port at 5.1%; the remaining 3 shareholders shown hold smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Data availability
The register reports 10 shareholders in total, though only the top 5 by holding are shown in this view.
Data-provider feed — rows as supplied to Zavia for National Tax Agency — Corporate Number Publication Site, including entries the profile above does not cover. These rows are not a verbatim copy of the register: they have been found to duplicate the same person under different spellings and to keep a status of Active after an appointment ended. Where they disagree with the profile above, the profile is the checked version.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| DFA International Core Equity Portfolio | 36.3% | National Tax Agency — Corporate Number Publication Site | |
| DFA International Vector Equity Port | 5.1% | National Tax Agency — Corporate Number Publication Site | |
| Dimensional ETF Tr-Dimensional International Core Equity 2 ETF | 4% | National Tax Agency — Corporate Number Publication Site | |
| DFA Investment Dimensions-DFA World Ex U.S. Targeted Value Port | 2.6% | National Tax Agency — Corporate Number Publication Site | |
| Dimensional ETF Tr-Dimensional International Small Cap ETF | 2% | National Tax Agency — Corporate Number Publication Site |
Officers
5
Directors and officers of Medical System Network Co., Ltd.
The Gm Of Accounting And Finance Division, Managing Executive Officer & Director of Medical System Network Co., Ltd. currently on record is Eiji Hirashima; five officers are currently on record for Medical System Network Co., Ltd., filed with National Tax Agency — Corporate Number Publication Site. Management authority at Medical System Network Co., Ltd. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control. The source filing doesn't specify representation authority — whether officers can act individually or must sign jointly to bind the company — so that detail isn't available here.
Data availability
The register reports 9 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Data-provider feed — rows as supplied to Zavia for National Tax Agency — Corporate Number Publication Site, including entries the profile above does not cover. These rows are not a verbatim copy of the register: they have been found to duplicate the same person under different spellings and to keep a status of Active after an appointment ended. Where they disagree with the profile above, the profile is the checked version.
Group Structure
Group structure of Medical System Network Co., Ltd.
Medical System Network Co., Ltd. has no recorded parent company — it sits at the top of its own group structure, with 14 subsidiaries recorded beneath it across 1 jurisdiction. Each of these downward relationships is derived rather than filed: resolved by matching entities across the registry network, not stated directly in a single document.
- NANOHANANISHINIHON, K.K. (Japan)
- NANOHANA HIGASHINIHON CO., LTD. (Japan)
- PHARMASHIFT CO.,LTD. (Japan)
- NANOHANA TOHOKU, K.K. (Japan)
- HOKKAIDO INSTITUTE FOR PHARMACY BENEFIT CO., LTD. (Japan)
- NANOHANA CHUBU, K.K. (Japan)
- KAZU ENTERPRISE, Y.K. (Japan)
- PALTECNO CO., LTD. (Japan)
- AGRIMAS CORP. (Japan)
- MEDILOGINET, K.K. (Japan)
Data availability
Those 14 subsidiaries span Japan jurisdiction, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear. One of the 14 go a level deeper still, with its own further subsidiaries recorded beneath it — additional ownership layers this view doesn't expand.
Data-provider feed — rows as supplied to Zavia for National Tax Agency — Corporate Number Publication Site, including entries the profile above does not cover. These rows are not a verbatim copy of the register: they have been found to duplicate the same person under different spellings and to keep a status of Active after an appointment ended. Where they disagree with the profile above, the profile is the checked version.
Medical System Network Co., Ltd.
Japan
Get complete shareholder and officer records, ultimate beneficial owner resolution, and ongoing ownership monitoring.
Frequently Asked Questions
Who owns Medical System Network Co., Ltd.?
Five shareholders are currently on record for Medical System Network Co., Ltd., reflecting the kabunushi meibo (shareholder register) maintained under Articles 121-122 of the Companies Act rather than a public filing. The largest of these is DFA International Core Equity Portfolio, holding 36.3% — the largest recorded stake — followed by DFA International Vector Equity Port at 5.1%; the remaining 3 shareholders shown hold smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Who is Medical System Network Co., Ltd.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for Medical System Network Co., Ltd. is itself a company rather than a natural person, so no Ultimate Beneficial Owner (UBO) is identified at this level; establishing one would require tracing the ownership of each shareholding company in turn.
How many shareholders does Medical System Network Co., Ltd. have on record?
5 shareholders are shown on record for Medical System Network Co., Ltd.. The register reports 10 in total; only the top 5 by holding are shown here.
What is Medical System Network Co., Ltd.'s company registration number?
Medical System Network Co., Ltd.'s registration number is 6430001025872, filed with National Tax Agency — Corporate Number Publication Site in Japan. Its current status on the register is active.
Is Medical System Network Co., Ltd. still an active company?
Medical System Network Co., Ltd.'s status on National Tax Agency — Corporate Number Publication Site is listed as active.
When was Medical System Network Co., Ltd. incorporated?
Medical System Network Co., Ltd. was incorporated on 5 October 2015, according to National Tax Agency — Corporate Number Publication Site.
What is Medical System Network Co., Ltd.'s registered address?
The registered address on file for Medical System Network Co., Ltd. is Chuo Ward, Sapporo City, Japan.
What legal structure is Medical System Network Co., Ltd. registered as?
Medical System Network Co., Ltd. is registered as a Private limited company (Ltd.) in Japan.
Who are the officers/directors of Medical System Network Co., Ltd.?
The Gm Of Accounting And Finance Division, Managing Executive Officer & Director of Medical System Network Co., Ltd. currently on record is Eiji Hirashima; five officers are currently on record for Medical System Network Co., Ltd., filed with National Tax Agency — Corporate Number Publication Site. Management authority at Medical System Network Co., Ltd. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does Medical System Network Co., Ltd. have a parent company or subsidiaries?
Medical System Network Co., Ltd. has no recorded parent company — it sits at the top of its own group structure, with 14 subsidiaries recorded beneath it across 1 jurisdiction. Those 14 subsidiaries span Japan jurisdiction, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear. One of the 14 go a level deeper still, with its own further subsidiaries recorded beneath it — additional ownership layers this view doesn't expand.
Can Zavia monitor changes to Medical System Network Co., Ltd.'s ownership over time?
This profile reflects a point-in-time snapshot from National Tax Agency — Corporate Number Publication Site. Zavia's monitoring API can track changes to Medical System Network Co., Ltd.'s registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access Medical System Network Co., Ltd.'s data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including Japan, so records like Medical System Network Co., Ltd.'s registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from National Tax Agency — Corporate Number Publication Site and was last synced on 28 September 2026.