Oncotherapy Science Co., Ltd.
Oncotherapy Science Co., Ltd. is a registered legal entity registered in Japan under 1020001077150, 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 Kawasaki Ward, Kawasaki City, Japan. 2 shareholders are on record for Oncotherapy Science 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 3 October 2026.
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Shareholders
2
Two shareholders are currently on record for Oncotherapy Science 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 SPDR Portfolio Developed World ex-US ETF, holding 75.8% — a majority holding — followed by SPDR (R) Idx Shares-SPDR (R) S&P (R) International Small Cap ETF at 24.2%.
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.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| SPDR Portfolio Developed World ex-US ETF | 75.8% | National Tax Agency — Corporate Number Publication Site | |
| SPDR (R) Idx Shares-SPDR (R) S&P (R) International Small Cap ETF | 24.2% | National Tax Agency — Corporate Number Publication Site |
Officers
3
Three officers are currently on record for Oncotherapy Science Co., Ltd., filed with National Tax Agency — Corporate Number Publication Site. Hatsuo Kato serves as Executive Chairman; Junichi Shimada serves as President, Ceo & Director; Jae-hyun Park serves as Chief Scientific Officer & Director.
Management authority at Oncotherapy Science 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.
Group Structure
Oncotherapy Science Co., Ltd. has no recorded parent company — it sits at the top of its own group structure, with 1 subsidiary 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.
Those 1 subsidiary spans 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.
Oncotherapy Science Co., Ltd.
Japan
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Frequently Asked Questions
Who owns Oncotherapy Science Co., Ltd.?
Two shareholders are currently on record for Oncotherapy Science 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 SPDR Portfolio Developed World ex-US ETF, holding 75.8% — a majority holding — followed by SPDR (R) Idx Shares-SPDR (R) S&P (R) International Small Cap ETF at 24.2%. 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 Oncotherapy Science Co., Ltd.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for Oncotherapy Science 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 Oncotherapy Science Co., Ltd. have on record?
2 shareholders are shown on record for Oncotherapy Science Co., Ltd..
What is Oncotherapy Science Co., Ltd.'s company registration number?
Oncotherapy Science Co., Ltd.'s registration number is 1020001077150, filed with National Tax Agency — Corporate Number Publication Site in Japan. Its current status on the register is active.
Is Oncotherapy Science Co., Ltd. still an active company?
Oncotherapy Science Co., Ltd.'s status on National Tax Agency — Corporate Number Publication Site is listed as active.
When was Oncotherapy Science Co., Ltd. incorporated?
Oncotherapy Science Co., Ltd. was incorporated on 5 October 2015, according to National Tax Agency — Corporate Number Publication Site.
What is Oncotherapy Science Co., Ltd.'s registered address?
The registered address on file for Oncotherapy Science Co., Ltd. is Kawasaki Ward, Kawasaki City, Japan.
Who are the officers/directors of Oncotherapy Science Co., Ltd.?
Three officers are currently on record for Oncotherapy Science Co., Ltd., filed with National Tax Agency — Corporate Number Publication Site. Hatsuo Kato serves as Executive Chairman; Junichi Shimada serves as President, Ceo & Director; Jae-hyun Park serves as Chief Scientific Officer & Director. Management authority at Oncotherapy Science Co., Ltd. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does Oncotherapy Science Co., Ltd. have a parent company or subsidiaries?
Oncotherapy Science Co., Ltd. has no recorded parent company — it sits at the top of its own group structure, with 1 subsidiary recorded beneath it across 1 jurisdiction. Those 1 subsidiary spans 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.
Can Zavia monitor changes to Oncotherapy Science 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 Oncotherapy Science 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 Oncotherapy Science 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 Oncotherapy Science 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 3 October 2026.