Citigroup Inc.'s investment-banking unit in Japan is managing the nation's fourth-biggest share sale this year and its largest underwriting assignment since the government sold stock in Toyota Motor Corp. in November.

Nikko Citigroup Ltd. is arranging the sale of about 80 billion yen in new shares by property trust DA Office Investment Corp.

Citigroup, the world's biggest financial-services company by market value, is trying to revive its Japanese business three years after regulators shut down its private bank in Tokyo and barred the company from bidding in government-bond auctions.