Tokyo stocks closed flat Tuesday ahead of key events including an EU summit, while Sony surged more than nine percent on a report that a US hedge fund plans to bump up its investment. The benchmark Nikkei 225 index edged up 0.19 percent, or 40.94 points, to 21,802.59, but the broader Topix index eased 0.09 percent, or 1.38 points, to 1,618.76.
"Trade is seen lacking a sense of direction and investors are taking a wait-and-see attitude ahead of the IMF growth forecast this evening and the EU summit and the ECB meeting" on Wednesday, Okasan Online Securities said in a commentary.
Investors are shifting their focus to earnings as major Japanese firms are set to start releasing their full-year results later this month, brokers said.
Sony jumped 9.26 percent to 5,250 yen following a report that hedge fund Third Point is raising funds to build up its stake in the Japanese electronics company.
The article said the group led by activist investor Daniel Loeb was aiming to raise between $500 million and $1 billion to increase its holding in Sony and push for changes.
Third Point has a reputation for aggressively pushing reforms at key firms and has targeted Sony before, unsuccessfully pushing it to spin off its entertainment division.
Energy firms were higher, reflecting rallies in crude prices, with oil developer and refiner JXTG gaining 2.94 percent to 555.1 yen and its rival Inpex up 1.02 percent at 1,080 yen.
Nintendo jumped 1.93 percent to 33,240 yen.