Exhibit 8.1
 LIST OF
SUBSIDIARIES OF NIPPON OIL CORPORATION
  Country of
    
    Equity OwnershipName
    
    Incorporation
    
    (%)
    
    Main BusinessNippon Petroleum Refining Co., Ltd.
    
    Japan
    
    
    100.0
    
    
    Refining and processing of refined
petroleum products and
petrochemicalsNippon Oil Staging Terminal Co., Ltd.
    
    Japan
    
    
    100.0
    
    
    Operation of petroleum storage and
terminal facilitiesNippon Oil Tanker Corporation
    
    Japan
    
    
    100.0
    
    
    Ocean transportation of crude oil
and refined petroleum productsNihonkai Oil Co., Ltd.
    
    Japan
    
    
    100.0
    
    
    Operation of petroleum storage and
terminal facilitiesENEOS Frontier Co., Ltd.
    
    Japan
    
    
    100.0
    
    
    Sales of refined petroleum productsNisseki Plasto Co., Ltd.
    
    Japan
    
    
    100.0
    
    
    Manufacturing and sales of
processed synthetic resin products
including nonwoven materialsWakayama Petroleum Refining Co., Ltd.
    
    Japan
    
    
    99.8
    
    
    Manufacturing and sales of refined
petroleum productsOkinawa CTS Corporation
    
    Japan
    
    
    65.0
    
    
    Operation of petroleum storage and
terminal facilitiesKawasaki Natural Gas Generation Co.,
Ltd.
    
    Japan
    
    
    51.0
    
    
    Generation and supply of electricityENEOS CELLTECH Co., Ltd.
    
    Japan
    
    
    81.0
    
    
    Development, manufacturing and
sales of fuel cell systemsSpace Energy Corporation
    
    Japan
    
    
    60.8
    
    
    Manufacture and sale of silicon
wafers and other related products
for solar cellsNippon Oil (U.S.A.) Ltd.
    
    U.S.A.
    
    
    100.0
    
    
    Sales of refined petroleum productsNippon Oil Lubricants (America) LLC
    
    U.S.A.
    
    
    100.0
    
    
    Manufacturing and sales of
lubricants and greaseNisseki Chemical Texas Inc.
    
    U.S.A.
    
    
    100.0
    
    
    Manufacturing and sales of
ethylidene norbornene (ENB) and
other specialty chemicals and
solventsAtlanta Nisseki CLAF, Inc.
    
    U.S.A.
    
    
    100.0
    
    
    Manufacturing and sales of nonwoven
materialsNippon Oil (Asia) Pte. Ltd.
    
    Singapore
    
    
    100.0
    
    
    Purchasing and selling of crude oil
and refined petroleum productsNippon Oil Europe Ltd.
    
    U.K.
    
    
    100.0
    
    
    Purchasing and selling of crude oil
and refined petroleum productsNippon Oil (Australia) Pty. Ltd.
    
    Australia
    
    
    100.0
    
    
    Purchasing and selling of coal and
mineral resourcesNippon Oil (Guangzhou) Lubricants 
Corporation
    
    China
    
    
    90.0
    
    
    Manufacturing and sales of
lubricantsNippon Oil Exploration Ltd.
    
    Japan
    
    
    100.0
    
    
    Overall control of exploration and
production of oil and gas
 8.1-1




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##### 



Country of
    
    Equity OwnershipName
    
    Incorporation
    
    (%)
    
    Main BusinessJapan Vietnam Petroleum Co., Ltd.
    
    Japan
    
    
    97.1
    
    
    Exploration and production of oil
and gas in VietnamNippon Oil Exploration (Malaysia), Ltd.
    
    Japan
    
    
    78.7
    
    
    Exploration and production of oil
and gas in MalaysiaNippon Oil Exploration (Sarawak), Ltd.
    
    Japan
    
    
    76.5
    
    
    Exploration and production of oil
and gas in MalaysiaNippon Oil Exploration (Berau), Ltd.
    
    Japan
    
    
    51.0
    
    
    Exploration and production of oil
and gas in IndonesiaNippon Oil Exploration (Myanmar), Ltd.
    
    Japan
    
    
    50.0
    
    
    Exploration and production of oil
and gas in MyanmarNippon Oil Exploration U.S.A. Ltd.
    
    U.S.A.
    
    
    100.0
    
    
    Exploration and production of oil
and gasNippon Oil Exploration and Production
U.K. Ltd.
    
    U.K.
    
    
    100.0
    
    
    Exploration and production of oil
and gasMOCAL Energy Ltd.
    
    Canada
    
    
    100.0
    
    
    Production of synthetic crude oilNippon Oil Exploration (Dampier) Pty
Ltd.
    
    Australia
    
    
    100.0
    
    
    Exploration and production of oilNIPPO Corporation
    
    Japan
    
    
    57.2
    
    
    Road construction and paving, civil
engineering and planning, designing
and construction of oil related
facilitiesNippon Oil Real Estate Co., Ltd.
    
    Japan
    
    
    100.0
    
    
    Purchase, sale, lease and
management of real estateNippon Oil Trading Corporation
    
    Japan
    
    
    100.0
    
    
    Sales of car-related items, leases
of various machinery,
administration of various types of
insurance policies, travel agency
business and operation of sports
facilitiesNippon Oil Business Services Co., Ltd.
    
    Japan
    
    
    100.0
    
    
    Accounting-related work, salary and
benefit & welfare-related work on
commissionNippon Oil Information Technology 
Corporation
    
    Japan
    
    
    51.0
    
    
    Commissioned development and
operation of computer and
communications systemsMizushima LNG Co., Ltd.
    
    Japan
    
    
    50.0
    
    
    Acceptance, storage and
regasification of liquefied natural
gas, and delivery of gasJapan Oil Transportation Co., Ltd.
    
    Japan
    
    
    29.4
    
    
    Land transportation of refined
petroleum productsTianjin Nisseki Lubricants & Grease
Co., Ltd.
    
    China
    
    
    40.0
    
    
    Production and sales of lubricants
 8.1-2