Validation of Proved Reserves Through Third-Party Evaluation
First written in FY2017. 3 of 7 entries say "Advanced", first in FY2020. Latest entry: FY2025.
No other company in this theme has enough history to compare yet.
- FY2025AdvancedAnnual report
「Independent evaluations have been conducted for approximately 70% of the total proved reserves as of 31 March 2025 shown in the table above [2].」
The percentage of total proved reserves covered by independent evaluations increased from approximately 60% in the previous fiscal year to approximately 70%. The percentage covered domestically remained at approximately 82%. - FY2023AdvancedAnnual report
「Independent evaluations have been conducted for approximately 47% of the total proved reserves as of 31 March 2023 shown in the table above [2].」
The percentage covered by independent evaluations increased from approximately 37% in the previous fiscal year to approximately 47%. Approximately 73% of domestic proved reserves underwent independent evaluation and appraisal. - FY2022Update to the Percentage Subject to Independent EvaluationAnnual report
「In addition, to validate the appropriateness of the reserves assessments and judgments made by the company itself, the company commissioned Ryder Scott Company, L.P. to conduct an independent evaluation and appraisal of approximately 77% of the proved reserves in Japan held by the company and its consolidated companies as of 31 March 2022 shown in the table above [1]. Overseas, the reserves of Japex (U.S.) Corp., JAPEX UK E&P Ltd. and Kangean Energy Indonesia Ltd. have undergone independent evaluations. In total, independent evaluations have been conducted for approximately 37% of the total proved reserves as of 31 March 2022 shown in the table above [2].」
The company continued independent evaluations and disclosed that approximately 77% of domestic reserves and approximately 37% of total proved reserves, including overseas reserves, were covered. - FY2020AdvancedAnnual report
「Independent evaluations have been conducted for approximately 67% of the total proved reserves as of 31 March 2020 shown in the table above [3].」
The percentage of total proved reserves covered by independent evaluations increased from approximately 61% in the previous fiscal year to approximately 67%. The company disclosed that approximately 68% of domestic reserves were covered. - FY2019SoftenedAnnual report
「In addition, to validate the appropriateness of the reserves assessments and judgments made by the company itself, the company commissioned Ryder Scott Company, L.P. to conduct an independent evaluation and appraisal of approximately 66% of the proved recoverable reserves in Japan held by the company and its consolidated companies as of 31 March 2019 shown in the table above [1]. Overseas, the bitumen reserves in the block areas held by Japan Canada Oil Sands Limited have undergone an independent evaluation by GLJ Petroleum Consultants Ltd. [2], and the reserves of JAPEX Montney Ltd., Japex (U.S.) Corp. and Kangean Energy Indonesia Ltd. have also undergone independent evaluations. In total, independent evaluations have been conducted for approximately 61% of the total proved reserves as of 31 March 2019 shown in the table above [3].」
Independent evaluations continued, but the percentage of total proved reserves covered declined from approximately 79% in the previous fiscal year to approximately 61%. - FY2018Update to the Percentage Subject to Independent EvaluationAnnual report
「Including this, independent evaluations have been conducted for approximately 79% of the total proved reserves as of 31 March 2018 shown in the table above [3].」
The company disclosed that approximately 79% of proved reserves had undergone independent evaluation. The percentage changed from approximately 86% in the previous fiscal year. - FY2017First statedAnnual report
「Including this, independent evaluations have been conducted for approximately 86% of the total proved reserves as of 31 March 2017 shown in the table above, comprising 6,995 thousand kl of crude oil, 22,076 thousand kl of bitumen and 27,737 million m3 of gas [3].」
The company disclosed that independent evaluations had been conducted for approximately 86% of total proved reserves, validating the appropriateness of its internally assessed figures.