Idemitsu Kosan Co.,Ltd. — Investor Relations & Filings
Idemitsu Kosan is an integrated energy and materials company. Its core operations encompass the refining and marketing of petroleum products through an extensive service station network, alongside the production of basic chemicals derived from its refining processes. The company's resource division develops oil, natural gas, coal, and geothermal energy assets. In parallel, Idemitsu is advancing its functional materials business, developing high-performance products such as materials for next-generation batteries. The company also manages a diverse power generation portfolio, including solar, wind, biomass, and natural gas facilities, supplying electricity to wholesale and retail customers. A key strategic focus is the transition toward carbon neutrality through the development of sustainable aviation fuel (SAF), synthetic fuels, and other low-carbon solutions.
Recent filings
| Filing | Released | Lang | Actions |
|---|---|---|---|
| 自己株券買付状況報告書（法２４条の６第１項に基づくもの） | 2025-11-10 | Japanese | |
| 変更報告書 | 2025-11-05 | Japanese | |
| 訂正発行登録書 | 2025-10-29 | Japanese | |
| 公開買付報告書 | 2025-10-29 | Japanese | |
| 自己株券買付状況報告書（法２４条の６第１項に基づくもの） | 2025-10-10 | Japanese | |
| 公開買付届出書 | 2025-09-12 | Japanese |
Browse filings by year
12 years| ID | Filing | Released | Lang | Actions | |
|---|---|---|---|---|---|
|
2025
15 filings
| |||||
| 8161687 | 自己株券買付状況報告書（法２４条の６第１項に基づくもの） | 2025-11-10 | Japanese | ||
| 8094288 | 変更報告書 | 2025-11-05 | Japanese | ||
| 8053418 | 訂正発行登録書 | 2025-10-29 | Japanese | ||
| 8053159 | 公開買付報告書 | 2025-10-29 | Japanese | ||
| 7982420 | 自己株券買付状況報告書（法２４条の６第１項に基づくもの） | 2025-10-10 | Japanese | ||
| 7855744 | 公開買付届出書 | 2025-09-12 | Japanese | ||
| 7856055 | 自己株券買付状況報告書（法２４条の６第１項に基づくもの） | 2025-09-10 | Japanese | ||
| 7856610 | 訂正発行登録書 | 2025-08-29 | Japanese | ||
| 7858510 | 自己株券買付状況報告書（法２４条の６第１項に基づくもの） | 2025-08-08 | Japanese | ||
| 7240343 | 自己株券買付状況報告書（法２４条の６第１項に基づくもの） | 2025-07-10 | Japanese | ||
| 7242164 | 発行登録書（株券､社債券等） | 2025-07-01 | Japanese | ||
| 7243312 | 臨時報告書 | 2025-06-30 | Japanese | ||
| 7257315 | 内部統制報告書－第110期(2024/04/01－2025/03/31) | 2025-06-19 | Japanese | ||
| 7257269 | 確認書 | 2025-06-19 | Japanese | ||
| 7257275 | 有価証券報告書－第110期(2024/04/01－2025/03/31) | 2025-06-19 | Japanese | ||
Market data
Market data not available
Price history
Peer group · Manufacture of refined petroleum products; manufacture of fossil fuel products
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Idemitsu Kosan Co.,Ltd. via the API
Pull this company's filings, identifiers, and metadata as JSON or Markdown. Authenticate with your API key, then query by company ID, ISIN, or LEI. Full schema documented in the OpenAPI spec.
Endpoints
| GET | /api/companies/11451/ | Company identity, sector, listing, identifiers |
| GET | /api/filings/?company=11451 | Paginated list of all filings (filterable by type, date, language) |
| GET | /api/filings/{id}/ | Single filing — metadata, document URL, processing status |
| GET | /api/filings/{id}/markdown/ | Filing content as Markdown (PDF → text/tables/figures) |
| GET | /api/isins/?company=11451 | All ISINs registered to this company |
| GET | /api/filing-types/ | Reference: every filing-type code + category |
cURL
$ curl https://api.financialreports.eu/api/filings/?company=11451 \ -H "x-api-key: $FR_API_KEY" \ -H "Accept: application/json"
Python
import requests r = requests.get( "https://api.financialreports.eu/api/filings/", params={"company": 11451}, headers={"x-api-key": API_KEY}, ) filings = r.json()["results"]
MCP server
// MCP server URL https://mcp.financialfilings.com/mcp // Once connected, the LLM can query this company directly: "Pull the latest 5 filings for Idemitsu Kosan Co.,Ltd. (id: 11451)"
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