Idemitsu Kosan Co., Ltd.
Idemitsu Kosan Co., Ltd. is a Private limited company (Ltd.) registered in Japan under 9010001011318, 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. 1 shareholder is on record for Idemitsu Kosan 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 22 September 2026.
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Shareholders
1
Shareholders of Idemitsu Kosan Co., Ltd.
One shareholder is currently on record for Idemitsu Kosan 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 iShares Trust-iShares Core MSCI EAFE ETF, holding 11.6% — the largest recorded stake. Because the 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.
Officers
5
Directors and officers of Idemitsu Kosan Co., Ltd.
The Senior Executive Officer of Idemitsu Kosan Co., Ltd. on record is Shintaro Ishida; 5 officers are shown here, filed with National Tax Agency — Corporate Number Publication Site. Management authority at Idemitsu Kosan 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 24 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Group Structure
Group structure of Idemitsu Kosan Co., Ltd.
Idemitsu Kosan Co., Ltd. has no recorded parent company — it sits at the top of its own group structure, with 67 subsidiaries recorded beneath it across 18 jurisdictions. 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.
- Idemitsu Americas Holdings Corporation (United States)
- IDEMITSU KOSAN CO LTD (MUSCAT BRANCH) (Oman)
- IDEMITSU LUBE INDIA PRIVATE LIMITED (India)
- APOLLO LINK CO., LTD. (Japan)
- IDEMITSU NTG CO., LTD. (Japan)
- IDEMITSU LUBE-TECHNO CO., LTD. (Japan)
- IDEMITSU AVIATION CO., LTD. (Japan)
- TOA OIL CO., LTD. (Japan)
- IDEMITSU OITA GEOTHERMAL CO.,LTD. (Japan)
- IDEMITSU PLAN TECH HOKKAIDO, K.K. (Japan)
Data availability
Those 67 subsidiaries span Japan, United States, Oman, India, Malaysia, Vietnam, and 12 more jurisdictions, 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. 11 of the 67 go a level deeper still, with their own further subsidiaries recorded beneath them — additional ownership layers this view doesn't expand.
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Frequently Asked Questions
Who owns Idemitsu Kosan Co., Ltd.?
One shareholder is currently on record for Idemitsu Kosan 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 iShares Trust-iShares Core MSCI EAFE ETF, holding 11.6% — the largest recorded stake. Because the 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 Idemitsu Kosan Co., Ltd.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for Idemitsu Kosan 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 Idemitsu Kosan Co., Ltd. have on record?
1 shareholder is shown on record for Idemitsu Kosan Co., Ltd..
What is Idemitsu Kosan Co., Ltd.'s company registration number?
Idemitsu Kosan Co., Ltd.'s registration number is 9010001011318, filed with National Tax Agency — Corporate Number Publication Site in Japan. Its current status on the register is active.
Is Idemitsu Kosan Co., Ltd. still an active company?
Idemitsu Kosan Co., Ltd.'s status on National Tax Agency — Corporate Number Publication Site is listed as active.
When was Idemitsu Kosan Co., Ltd. incorporated?
Idemitsu Kosan Co., Ltd. was incorporated on 5 October 2015, according to National Tax Agency — Corporate Number Publication Site.
What is Idemitsu Kosan Co., Ltd.'s registered address?
The registered address on file for Idemitsu Kosan Co., Ltd. is Chiyoda Ward, Japan.
What legal structure is Idemitsu Kosan Co., Ltd. registered as?
Idemitsu Kosan Co., Ltd. is registered as a Private limited company (Ltd.) in Japan.
Who are the officers/directors of Idemitsu Kosan Co., Ltd.?
The Senior Executive Officer of Idemitsu Kosan Co., Ltd. on record is Shintaro Ishida; 5 officers are shown here, filed with National Tax Agency — Corporate Number Publication Site. Management authority at Idemitsu Kosan Co., Ltd. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does Idemitsu Kosan Co., Ltd. have a parent company or subsidiaries?
Idemitsu Kosan Co., Ltd. has no recorded parent company — it sits at the top of its own group structure, with 67 subsidiaries recorded beneath it across 18 jurisdictions. Those 67 subsidiaries span Japan, United States, Oman, India, Malaysia, Vietnam, and 12 more jurisdictions, 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. 11 of the 67 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 Idemitsu Kosan 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 Idemitsu Kosan 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 Idemitsu Kosan 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 Idemitsu Kosan 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 22 September 2026.