* Mitsui shares up 3.5 pct vs 1.7 pct rise in Nikkei 225
(Recasts, adds share price)

TOKYO, Aug 3 (Reuters) - Japan's Mitsui & Co will write off
its investment in the BP Plc well that caused the oil leak in the
Gulf of Mexico, the Nikkei business daily reported.

The trading house, which holds a 10 percent stake in the
ruptured well through its unit Mitsui Oil Exploration, will incur
a one-time charge of several billion yen for the April-June
quarter, the newspaper said.

The write-offs do not include any of the costs associated
with recovering the leaked oil in the Gulf, the Nikkei said.

Mitsui and Canada's Anadarko Petroleum Corp, which has 25
percent of the well, have said before U.S. Congress they will not
set aside money for cleanup costs along the Gulf Coast, arguing
that it is BP's responsibility.

BP has a 65 percent interest in the well and is its exclusive
operator, they said.

Shares of Mitsui & Co, which is set to report April-June
first-quarter earnings at 0500 GMT on Tuesday, jumped 5.3
percent to 1,168 yen, outperforming the benchmark Nikkei 225
which rose 1.7 percent.

Mitsui & Co officials were not immediately available for
comment.

The oil leakage killed 11 people and caused the worst
environmental disaster in U.S. history.
(Reporting by Abhinav Sharma in Bangalore and Mariko Katsumura
in Tokyo; Editing by Edwina Gibbs)