Open House Group Co., Ltd.
Open House Group Co., Ltd. is a Private limited company (Ltd.) registered in Japan under 5011001028165, 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 Chiyoda Ward, Japan. 5 shareholders are on record for Open House Group 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 30 September 2026.
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Shareholders
5
Shareholders of Open House Group Co., Ltd.
Five shareholders are currently on record for Open House Group 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 Vanguard International Stock Index-Total Intl Stock Indx, holding 8.3% — the largest recorded stake — followed by Pear Tree Polaris Foreign Value Small Cap Fund 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 11 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 |
|---|---|---|---|
| Vanguard International Stock Index-Total Intl Stock Indx | 8.3% | National Tax Agency — Corporate Number Publication Site | |
| Pear Tree Polaris Foreign Value Small Cap Fund | 5.1% | National Tax Agency — Corporate Number Publication Site | |
| Vanguard Tax Managed Fund-Vanguard Developed Markets Index Fund | 5% | National Tax Agency — Corporate Number Publication Site | |
| Fidelity Low-Priced Stock Fund | 4.8% | National Tax Agency — Corporate Number Publication Site | |
| iShares Core MSCI EAFE ETF | 3.7% | National Tax Agency — Corporate Number Publication Site |
Officers
5
Directors and officers of Open House Group Co., Ltd.
The Director & Founder of Open House Group Co., Ltd. currently on record is Masaaki Arai; five officers are currently on record for Open House Group Co., Ltd., filed with National Tax Agency — Corporate Number Publication Site. Management authority at Open House Group 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 14 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 Open House Group Co., Ltd.
Open House Group Co., Ltd. has no recorded parent company — it sits at the top of its own group structure, with 13 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.
- MELDIA CO., LTD. (Japan)
- OUCHI LINK CO., LTD. (Japan)
- OPEN HOUSE REAL ESTATE CO., LTD. (Japan)
- IBNET CO.,LTD (Japan)
- KAZE, K.K. (Japan)
- OH DIGITAL PARTNERS CO., LTD. (Japan)
- OPEN HOUSE CO., LTD. (Japan)
- OPEN HOUSE ARCHITECT CO., LTD. (Japan)
- PRESSANCE CO.,LTD. (Japan)
- PLUS-D INC. (Japan)
Data availability
Those 13 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. Four of the 13 go a level deeper still, with their own further subsidiaries recorded beneath them — 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.
Open House Group Co., Ltd.
Japan
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Frequently Asked Questions
Who owns Open House Group Co., Ltd.?
Five shareholders are currently on record for Open House Group 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 Vanguard International Stock Index-Total Intl Stock Indx, holding 8.3% — the largest recorded stake — followed by Pear Tree Polaris Foreign Value Small Cap Fund 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 Open House Group Co., Ltd.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for Open House Group 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 Open House Group Co., Ltd. have on record?
5 shareholders are shown on record for Open House Group Co., Ltd.. The register reports 11 in total; only the top 5 by holding are shown here.
What is Open House Group Co., Ltd.'s company registration number?
Open House Group Co., Ltd.'s registration number is 5011001028165, filed with National Tax Agency — Corporate Number Publication Site in Japan. Its current status on the register is active.
Is Open House Group Co., Ltd. still an active company?
Open House Group Co., Ltd.'s status on National Tax Agency — Corporate Number Publication Site is listed as active.
When was Open House Group Co., Ltd. incorporated?
Open House Group Co., Ltd. was incorporated on 5 October 2015, according to National Tax Agency — Corporate Number Publication Site.
What is Open House Group Co., Ltd.'s registered address?
The registered address on file for Open House Group Co., Ltd. is Chiyoda Ward, Japan.
What legal structure is Open House Group Co., Ltd. registered as?
Open House Group Co., Ltd. is registered as a Private limited company (Ltd.) in Japan.
Who are the officers/directors of Open House Group Co., Ltd.?
The Director & Founder of Open House Group Co., Ltd. currently on record is Masaaki Arai; five officers are currently on record for Open House Group Co., Ltd., filed with National Tax Agency — Corporate Number Publication Site. Management authority at Open House Group Co., Ltd. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does Open House Group Co., Ltd. have a parent company or subsidiaries?
Open House Group Co., Ltd. has no recorded parent company — it sits at the top of its own group structure, with 13 subsidiaries recorded beneath it across 1 jurisdiction. Those 13 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. Four of the 13 go a level deeper still, with their own further subsidiaries recorded beneath them — additional ownership layers this view doesn't expand.
Can Zavia monitor changes to Open House Group 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 Open House Group 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 Open House Group 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 Open House Group 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 30 September 2026.