TOKYO, May 15 (Reuters) - Japan's Nikkei index rose to its highest in 1-1/2 years on Monday, as investors sought stocks with robust earnings, while the yen's weakness also boosted sentiment.

The Nikkei share average rose 0.4% to 29,505.80 by the midday break, crossing 25,500 for the first time since November 2021. The broader Topix rose 0.49% to 2,106.74.

"Investors scooped up individual stocks that reported positive earnings, which boosted the overall market," said Maki Sawada, a strategist at Nomura Securities.

The U.S. dollar kept its strength against a basket of major currencies, after posting the biggest weekly gain last week.

A softer yen tends to help exporter shares as it increases the value of overseas profits in yen terms when companies repatriate them to Japan.

Among individual shares, Shiseido jumped 4.51% after the cosmetic maker beat consensus by posting a 97% jump in its net profit for three months through March.

Beer maker Asahi Group Holdings rose 2.91% after its quarterly net profit grew more than four times.

Phone company NTT advanced 3.295 after announcing a stock split.

SBI Shinsei Bank surged 8.47% after Japanese online financial conglomerate SBI Holdings Inc said it would take midsize lender private.

SBI Holdings rose 2.41%.

Uniqlo brand owner Fast Retailing rose 0.7% to provide the biggest boost to the Nikkei. Air-conditioning maker Daikin Industries

Bucking the trend, medical equipment maker Olympus fell 7.65% to weigh on the Nikkei the most. Chip-making equipment maker Tokyo Electron lost 1.46%. (Reporting by Junko Fujita; editing by Uttaresh Venkateshwaran)