(Updates with closing prices)

TOKYO, June 20 (Reuters) - Japan's Nikkei share average

gave up early gains to end lower on Friday, as geopolitical

risks surrounding the Middle East conflict weighed on sentiment.

The Nikkei fell 0.22% to 38,403.23, after rising as

much as 0.4% earlier in the session. The index rose 1.5% for the

week.

The broader Topix fell 0.75% to 2,771.26 but posted

a 0.54% weekly gain.

"With the absence of market-moving catalysts, uncertainties

surrounding the Middle East tensions dragged investor

sentiment," said Shoichi Arisawa, general manager of the

investment research department at IwaiCosmo Securities.

The White House said on Thursday that U.S. President Donald

Trump will make a decision within the next two weeks whether to

support Israel in its ongoing conflict with Iran.

"On top of the uncertainties about the conflict in the

region, the outlook of the U.S. tariff plans remains unclear,"

said Arisawa.

Uniqlo-brand owner Fast Retailing ( FRCOF ) fell 1.8%,

dragging the Nikkei the most. Phone company KDDI ( KDDIF ) fell

1.72%.

Game maker Nintendo ( NTDOF ) slipped 4.11% to become the

worst percentage loser on the Nikkei.

Chip-related shares rose, with Advantest ( ADTTF ) jumping

4.2% to become the biggest support to the Nikkei. Lasertec ( LSRCF )

rose 4.97% to become the top percentage gainer on the

Nikkei.

Machinery maker Amada ( AMDWF ) rose 4.43%

Of more than 1,600 stocks trading on the Tokyo Stock

Exchange's prime market, 27% rose and 69% fell, while 3% traded

flat.