TOKYO, June 8 (Xinhua) -- Tokyo stocks closed lower Friday as investors took to taking profits after the Nikkei's four-day winning streak and ahead of a number of key financial and political events, including the Group of Seven (G7) summit starting later in the day in Canada.

The 225-issue Nikkei Stock Average lost 128.76 points, or 0.56 percent, from Thursday to close the day at 22,694.50.

The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, fell 7.57 points, or 0.42 percent, to finish at 1,781.44.

Trade was choppy early on, brokers here said, with a circumspect market mood setting in ahead of upcoming political events.

Upcoming events that could have a bearing on global bourses include the Group of Seven (G7) summit starting later in the day in Canada and the summit in Singapore next week between the U.S. and the Democratic People's Republic of Korea (DPRK), market analysts here highlighted.

A wait-and-see-mood was also evident Friday, traders said, as many investors eyed upcoming central bank meetings to be held in Japan, the United States and Europe next week for potential policy changes.

The market's upside was also capped by growing concerns that a possible interest rate hike in the U.S. next week could negatively impact currency rates in emerging markets, while Washington's protectionist trade push continues to unnerve global markets, strategists here also noted.

By the close of play, pulp and paper, marine transportation, and oil and coal product-linked issues comprised those that declined the most, and falling stocks outpaced advancing ones by 1,163 to 822 on the First Section, while 100 ended the day unchanged.

On the main section on Friday, trading volume increased to 1,610.57 million shares, rising from Thursday' volume of 1,434.15 million shares.

The turnover on the final trading day of the week came to 2,920.7 billion yen (26.68 billion U.S. dollars).?