The listing, which was first reported by Reuters on Wednesday, will represent a hefty cash boost for Rakuten, which boasts fast-growing fintech units as well as its mainstay e-commerce platform but has struggled with years of losses from the cost of building out its mobile phone business.

While global bank shares have been whipsawed in recent weeks following the collapse of a number of U.S. regional lenders and the turmoil at Credit Suisse, Japanese banks have so far avoided disastrous hits and are seen as broadly being able to weather the storm.

Rakuten plans to sell 53.95 million existing shares of Rakuten Bank Ltd to both domestic and overseas investors, while Rakuten Bank plans to issue 5.55 million new shares, according to regulatory filings. That would value the IPO at 106.8 billion yen ($807 million), based on the mid-range of the indicative price at 1,795 yen.

The offering will also include a greenshoe option of 4.46 million shares.

The listing would value Rakuten Bank at around 305 billion yen ($2.31 billion), according to Reuters calculations.

Shares of Rakuten closed up almost 6%, after Reuters reported that it planned to list the banking unit as early as next month, citing sources.

($1 = 132.3100 yen)

(Reporting by Miho Uranaka; Editing by David Dolan and Rashmi Aich)

By Miho Uranaka