The Nikkei share average rose to a fresh 2-month high in choppy trade on Wednesday as the weak yen supported sentiment toward Japan's export-driven economy, but gains were limited.
Investors largely stayed on the sidelines before major events due this week, such as a European Central Bank meeting on Thursday and US jobs data on Friday.
The Nikkei ended 0.2% higher to 15,067.96, the highest closing level since April 3.
The broader Topix added 0.4% to 1,233.95, while the new JPX-Nikkei Index 400 rose 0.5% to 11,248.49.