Tokyo stocks opened 0.69 percent higher on Tuesday, supported by gains on Wall Street and stable currency rates.
The Nikkei 225 index at the Tokyo Stock Exchange was up 80.28 points at 11,732.57 at the start.
The key index was likely to remain stable with an upside bias after US bourses edged ahead, while the dollar and the euro held steady against the yen, brokers said.
"The yen remains on a trajectory for further weakening, which should continue to support stock prices," said SMBC Nikko Securities general manager of equities Hiroichi Nishi.
The yen has been under pressure on expectations that the Bank of Japan (BoJ) will adopt fresh credit easing measures under a new governor.
Haruhiko Kuroda, a finance veteran the government nominated to head the central bank, told Japan's parliament Monday that if confirmed as BoJ head, he would do "everything possible" to reverse years of growth-sapping deflation.
The dollar was at 93.43 yen in early Asian trade Tuesday against 93.46 yen in New York Monday afternoon.
The euro bought 121.78 yen and $1.3032 compared with 121.74 yen and $1.3024 in US trade.
-- Dow Jones Newswires contributed to this article--