H-One Co., Ltd.
H-One Co., Ltd. is a Private limited company (Ltd.) registered in Japan under 1011501015336, 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 Kita Ward, Japan. 5 shareholders are on record for H-One 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 1 October 2026.
- Company fundamentals
- Corporate linkage & group structures
- Digitized company financials
- Firmographics — websites, social profiles, revenue and employee estimates
Shareholders
5
Shareholders of H-One Co., Ltd.
Five shareholders are currently on record for H-One 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 Small Cap Value Portfolio, holding 45.5% — the largest recorded stake — followed by DFA Japanese Small Company Series at 17.5%; 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 Small Cap Value Portfolio | 45.5% | National Tax Agency — Corporate Number Publication Site | |
| DFA Japanese Small Company Series | 17.5% | National Tax Agency — Corporate Number Publication Site | |
| DFA International Core Equity Portfolio | 14.7% | National Tax Agency — Corporate Number Publication Site | |
| WisdomTree Tr-WisdomTree Japan Hedged Equity Fd | 8.6% | National Tax Agency — Corporate Number Publication Site | |
| SPDR (R) Idx Shares-SPDR (R) S&P (R) International Small Cap ETF | 3.8% | National Tax Agency — Corporate Number Publication Site |
Officers
5
Directors and officers of H-One Co., Ltd.
The Managing Officer, Head Of Production Planning Group & Director of H-One Co., Ltd. currently on record is Hiroyuki Watanabe; five officers are currently on record for H-One Co., Ltd., filed with National Tax Agency — Corporate Number Publication Site. Management authority at H-One 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.
Get complete shareholder and officer records, ultimate beneficial owner resolution, and ongoing ownership monitoring.
Frequently Asked Questions
Who owns H-One Co., Ltd.?
Five shareholders are currently on record for H-One 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 Small Cap Value Portfolio, holding 45.5% — the largest recorded stake — followed by DFA Japanese Small Company Series at 17.5%; 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 H-One Co., Ltd.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for H-One 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 H-One Co., Ltd. have on record?
5 shareholders are shown on record for H-One Co., Ltd.. The register reports 10 in total; only the top 5 by holding are shown here.
What is H-One Co., Ltd.'s company registration number?
H-One Co., Ltd.'s registration number is 1011501015336, filed with National Tax Agency — Corporate Number Publication Site in Japan. Its current status on the register is active.
Is H-One Co., Ltd. still an active company?
H-One Co., Ltd.'s status on National Tax Agency — Corporate Number Publication Site is listed as active.
When was H-One Co., Ltd. incorporated?
H-One Co., Ltd. was incorporated on 5 October 2015, according to National Tax Agency — Corporate Number Publication Site.
What is H-One Co., Ltd.'s registered address?
The registered address on file for H-One Co., Ltd. is Kita Ward, Japan.
What legal structure is H-One Co., Ltd. registered as?
H-One Co., Ltd. is registered as a Private limited company (Ltd.) in Japan.
Who are the officers/directors of H-One Co., Ltd.?
The Managing Officer, Head Of Production Planning Group & Director of H-One Co., Ltd. currently on record is Hiroyuki Watanabe; five officers are currently on record for H-One Co., Ltd., filed with National Tax Agency — Corporate Number Publication Site. Management authority at H-One Co., Ltd. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Can Zavia monitor changes to H-One 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 H-One 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 H-One 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 H-One 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 1 October 2026.