(Adds comment, stocks, details)
By Aiko Hayashi
TOKYO, April 18 (Reuters) - Japan's Nikkei stock average edged down 0.2 percent on Friday after a three-day winning streak, as investors moved to the sidelines ahead of earnings results from Citigroup <C.N>.
Exporters such as Canon Inc <7751.T> rose on a softer yen and receding pessimism about U.S. corporate profits after Google Inc <GOOG.O> reported solid earnings, while defensive issues such as drugmakers lost favour amid improving investor confidence.
"Investors in Tokyo actually don't want the market to gain too much today because after Citi's earnings the market could rally on short-covering," said Mitsushige Akino, chief fund manager at Ichiyoshi Investment Management Co Ltd.
"While Citi is expected to report bad earnings, it probably has plans to boost its capital, and potential rescue plans might have been discussed at the Group of Seven meeting."
Analysts on average expect Citigroup, the largest U.S. bank, to post a quarterly loss close to $5 billion.
The benchmark Nikkei average <
> fell 23.09 points to end the morning session at 13,375.21. It gained 3.7 percent over the past three days.The broader TOPIX index <
> shed 0.2 percent or 3.04 points to 1,290.28.The dollar was steady from late U.S. trading on Thursday at 102.53 yen <JPY=>, hovering near a one-month high of 102.95 yen hit in early April.
Investors have been wary of a stronger yen as it decreases the value of Japanese firms' overseas sales when translated back into the currency.
Trade was thin on the Tokyo exchange's first section, with 664 million shares changing hands, compared with last week's morning average of 840 million.
Declining stocks outnumbered advancing ones by nearly 2 to 1.
DRUGS DOWN, EXPORTERS UP
Katsuhiko Kodama, senior strategist at Toyo Securities, said defensive shares such as drugmakers were sold while exporters were bought on improving sentiment in the overall market, with automakers gaining on a softer yen and after their expected poor earnings had been priced in.
Astellas Pharma Inc <4503.T> shed 3.8 percent to 4,040 yen and Daiichi Sankyo Co Ltd <4568.T> gave up 3.2 percent to 2,880 yen.
Takeda Pharmaceutical Co Ltd <4502.T> fell 1 percent to 5,130 yen, dented after CLSA lowered its rating on Takeda to "outperform" from "buy" and cut the target price to 5,720 yen from 6,420 yen.
The brokerage said a series of alliances during the past two months would have a negative impact on Takeda's profits during the next five years.
Exporters rose, with Canon adding 2 percent to 5,050 yen and chip gear maker Tokyo Electron Ltd <8035.T> climbing 2.2 percent to 6,620 yen.
Google posted stronger-than-expected quarterly earnings after the closing bell on Thursday, with the Web search leader's shares jumping 18 percent in after-hours trading. [
]Toyota Motor Corp <7203.T>, Japan's biggest automaker, gained 1.6 percent to 5,090 yen and Honda Motor Co Ltd <7267.T> rose 1 percent to 3,050 yen.
The Nikkei business daily said on Thursday that Toyota would likely post a 20 percent fall in operating profit for the business year to March 2009 on slower U.S. sales and a stronger yen. [
]Bull-Dog Sauce Co Ltd <2804.T> jumped 6.3 percent to 255 yen after the Nikkei said on Friday that U.S. investment fund Steel Partners had sold its entire stake in the company by the end of March, ending a corporate battle that led to a top court ruling that endorsed Bull-Dog's anti-takeover moves.
(Editing by Brent Kininmont)