[Explanatory Material]

Financial Results

for the Six Months Ended September 30, 2023

November 10, 2023

Japan Petroleum Exploration Co., Ltd.

Note: This document has been translated from the Japanese original for reference purposes only.

In the event of any discrepancy between this translated document and the Japanese original, the original shall prevail.

Copyright © 2023 Japan Petroleum Exploration Co., Ltd. (JAPEX) All Rights Reserved.

Contents

. Financial Highlights and Business Progress

. Initiatives for Sustainable Growth and Medium- to Long-term Enhancement of Corporate Value

. Financial Results for the Six Months Ended September 30, 2023

. Revised Financial Forecasts for the fiscal year ending March 31, 2024

Note: This material also serves as the presentation material for the financial results briefing for the institutional investors and analysts to be held on November 13, 2023.

Copyright © 2023 Japan Petroleum Exploration Co., Ltd. (JAPEX) All Rights Reserved.

2

. Financial Highlights and Business Progress

. Initiatives for Sustainable Growth and Medium- to Long-term Enhancement of Corporate Value

. Financial Results for the Six Months Ended September 30, 2023

. Revised Financial Forecasts for the fiscal year ending March 31, 2024

Copyright © 2023 Japan Petroleum Exploration Co., Ltd. (JAPEX) All Rights Reserved.

3

. Financial Highlights and Business Progress

Financial Highlights

2Q FY3/24 Results Year-on-Year

(Billion Yen)

1-2Q FY3/23 (a)

1-2Q FY3/24 (a)

Change

Operating profit

19.3

28.5

+9.1

Ordinary profit

43.0

39.1

(3.9)

Profit attributable to owners of parent

31.4

27.7

(3.6)

  • Operating profit Increased due to growth of sales volume for U.S. tight oil development and increased sales prices of domestic natural gas
  • Ordinary profit Decreased due to decline in equity method profit and foreign exchange gains

FY3/24Forecasts Revision vs Aug.9 Forecasts

(Billion Yen)

Previous (f) Aug. 9, 2023

Revised (f) Nov. 10, 2023

Change

Operating profit

38.9

48.8

+9.9

Ordinary profit

44.8

57.0

+12.2

Profit attributable to owners of parent

34.0

45.0

+11.0

  • Operating profit Expect to increase due to anticipated increase in sales prices of domestic crude oil, domestic natural

a

gas, LNG, etc.

  • Ordinary profit Expect to increase due to increased foreign exchange gains

Shareholder Returns

  • Revised annual dividend forecast to 250 yen per share (interim 125 yen + year-end forecast 125 yen) Revision based on consolidated dividend payout ratio of 30
  • Decided to repurchase own shares up to 3 million shares or 20.0 billion yen

Copyright © 2023 Japan Petroleum Exploration Co., Ltd. (JAPEX) All Rights Reserved.

4

. Financial Highlights and Business Progress

Major Business Progress in the First Half of FY3/24

E&P Field

Domestic

  • Additional development of Katakai gas field in NiigataCompletion of the first well (May) / Start drilling of the second well (Aug)

Overseas

  • Capital participation in a subsidiary of U.K.-based Longboat Energy PLC (Longboat JAPEX Norge AS : LBJ) which promotes exploration and development in offshore Norway (May)
  • Acquisition of additional well interests in tight oil development project in U.S. (May)
  • Started production of crude oil and natural gas at the Seagull project in U.K. North SeaNov

I/U Field

Development of domestic renewable energy

  • Established PJ Asset Management Co., Ltd., to develop, manage and operate of solar power generation projectsJun
  • Started operation of Mitsuke PV Power Plant, NiigataAug
  • Invested in Storage battery-related company PowerX, IncAug

LNG transport and supply

  • Conducts Feasibility Study of Energy Service Utilizing LNG to the Industrial Park in Northern VietnamAug

CN Field

  • Agreed on Joint Evaluation with JFE Steel Corporation to Establish CCS Value Chain Originated from Japan Aligned with CCS Study in MalaysiaJun
  • Presented a carbon recycling scenario utilizing inter-industry collaboration in TomakomaiJul
  • Signed Joint Study Agreement Towards CO2 Injection Field Test at Sukowati Oil Field in IndonesiaJul
  • CCS Studies in Tomakomai Area and East-Niigata Area were commissioned as the "Business Feasibility Study on Japanese Advanced CCS Project" by JOGMEC in FY2023 (Jul and Aug)
  • Signed MOU with SKK Migas for cooperation in realizing CCS/CCUS Hub & Clusters in IndonesiaSep
  • Launched our first concrete CCS commercialization study in advanced overseas country by capital participation in Blue Spruce Operating LLC of the U.S. (Oct)

Copyright © 2023 Japan Petroleum Exploration Co., Ltd. (JAPEX) All Rights Reserved.

5

. Financial Highlights and Business Progress

Progress on Targets and Fund Allocation for FY3/24

Quantitative Targets and Fund Allocation Policies in JAPEX Management Plan 2022-2030

  • Set the quantitative targets, including long-termto be achieved by FY2030and interim by FY2026.
  • To allocate 450 billion yento investment in growth and 50 billion yen to shareholderreturns, from 500 billion yen accumulating cash inflows until FY2030

Quantitative target

Medium-toLong-term Targets

2Q FY3/24

FY3/24Forecasts

Items

Business Profit*1

FY2026

30 billion yen

29.7 billion yen

49.3 billion yen

FY2030

50 billion yen

ROE

FY2026

5%

N/A

9.9*2

FY2030

8%

Profit Composition

FY2026

6:4

73

73

(E&Pnon-E&Ps)

FY2030

55

Fund Allocation

Assumed allocation*3

2Q FY3/24

FY3/24Forecasts

Items

Growth Investments

FY2026

275 billion yen

35.7 billion yen

87.4 billion yenα

FY2030

450 billion yen

(Cumulative total 131.5 billion

yenα)

Shareholder Returns

FY2030

25 billion yen

11.9 billion yen*4

28.7 billion yen*5

FY2030

50 billion yen

(Cumulative total 42.5 billion

yen)

*1

Operating income and equity in earnings of affiliates (including profits distributed under limited partnership agreements and silent partnership agreements)

*2

Figures assume 454.1 billion yen in average equity at the beginning and end of the period

*3

Five-year cumulative total from FY2022 through FY2026 and nine-year cumulative total through FY2030, *4 FY 3/23 dividend, *5 FY3/23 dividend + FY3/24 interim dividend + share buyback

Copyright © 2023 Japan Petroleum Exploration Co., Ltd. (JAPEX) All Rights Reserved.

6

. Financial Highlights and Business Progress

. Initiatives for Sustainable Growth and Medium- to Long-term Enhancement of Corporate Value

. Financial Results for the Six Months Ended September 30, 2023

. Revised Financial Forecasts for the fiscal year ending March 31, 2024

Copyright © 2023 Japan Petroleum Exploration Co., Ltd. (JAPEX) All Rights Reserved.

7

. Initiatives for Sustainable Growth and Medium- to Long-term Enhancement of Corporate Value

Sustainable Growth and Medium- to Long-Term Enhancement of Corporate Value - Current Status Analysis

Market's evaluation (PBR etc.)

PBR is improving, but has not yet reached 1x

ROE of 16.9% in FY03/2023 and 9.9% in

FY03/2024 forecast are above the TSE prime

average, but lower-than-average PER is also

an issue as a reason for remaining at a low

PBR ratio.

In addition to standard industry issues such

as the sustainability of oil- and natural gas-

related businesses toward a decarbonized

society and the high volatility of oil and

Changes in PBR

Changes in Equity Ratio

Owner's Equity

Long-term debt

Other capital

Equity Ratio

JAPEX

TSE Prime Average

Withdrawal from

(Times

¥ billion

Canada 2 business

1.6

1.4

1.3

12,000

78.7

74.9 (%)

1.4

1.2

10,000

63.7

62.5

59.5

58.6

60.8

63.6

64.2

64.0

80.0

1.2

1.0

PBR x1.0

8,000

60.0

1.0

Withdrawal from

6,000

40.0

0.8

Canada 2 business

0.6

207

1,300 1,419 1,360 1,277 1,188

216

0.6

0.4

4,000

502

5

3

0.3

0.3

2,000

20.0

0.4

0.2

80

0.0

0.0

2020/3

2021/3

2022/3

2023/3

natural gas prices, we recognize that the lack

of understanding and confidence in our

efforts to enhance corporate value is one of

the factors behind the low PBR.

Cost of equity is approximately 8%.

Equity ratio is high after termination of two

projects in Canada.

Changes in ROE

JAPEX

TSE Prime Average

(%)16.9

15.0

7.2

9.5

9.2

9.9 *

10.0

6.6

5.0

Withdrawal from

0.0

6.5

Canada 2 business

(5.0)

(0.7)

(10.0)(8.0)

(15.0)

2020/3 2021/3 2022/3 2023/3 2024/3 Forecast

Changes in PER

JAPEX

TSE Prime Average

(Times

26.2

30.0

19.7

15.0

20.0

13.3

Withdrawal from

10.0

3.7

Canada 2 business

0.0

(10.0)

3.6

(4.7)

(20.0)

(30.0)

(40.0)

(43.1)

(50.0)

2020/3

2021/3

2022/3

2023/3

* Figures assume 454.1 billion yen in average equity at the beginning and end of the period

Copyright © 2023 Japan Petroleum Exploration Co., Ltd. (JAPEX) All Rights Reserved.

8

. Initiatives for Sustainable Growth and Medium- to Long-term Enhancement of Corporate Value

Sustainable Growth and Medium- to Long-term Enhancement of Corporate Value - Policies in the Future

Investments focused on capital efficiency

  • Continue to invest in growth aligned with the management plan and expand the business asset portfolio that will be the source of future earnings
  • Consideration of optimal capital structure in parallel with business portfolio constructionThe equity ratio, which has temporarily increased, is expected to decline due to the utilization of interest-bearing debt in conjunction with the steady execution of growth investments

Enhancement of Shareholder Returns

  • We repurchased up to 3 million shares (5.5% of outstanding shares) for up to ¥20.0 billion, using temporary upside cash from the recent rise in oil and gas prices
  • Continuous verification of the rationality of strategic shareholdings

Continuous dialogue with stakeholder

  • The Board of Directors will continue to regularly analyze and consider the management plan's progress, and dialogue with the market to improve ROE and PER.
  • The management plan sets ROE targets based on the assumption of an oil price of $50 per barrel, but assuming that the current oil price level ($80 per barrel) continues, the ROE level is expected to be around 10% in FY2026 and 13% in FY2030.

ROE Oil Price Sensitivities

ROEUSD 50/bbl

ROEUSD 80/bbl

14.0

Approx. 13%

12.0

Approx. 10%

+5%

10.0

9.9%

+5%

8.0

6.0

8%

4.0

5%

2.0

0.0

FY2023

FY2026

FY2030

Copyright © 2023 Japan Petroleum Exploration Co., Ltd. (JAPEX) All Rights Reserved.

9

. Financial Highlights and Business Progress

. Initiatives for Sustainable Growth and Medium- to Long-term Enhancement of Corporate Value

. Financial Results for the Six Months Ended September 30, 2023

. Revised Financial Forecasts for the fiscal year ending March 31, 2024

Copyright © 2023 Japan Petroleum Exploration Co., Ltd. (JAPEX) All Rights Reserved.

10

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JAPEX - Japan Petroleum Exploration Co. Ltd. published this content on 10 November 2023 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 14 November 2023 13:56:44 UTC.