Nakashima's appointment will take effect on Friday, Japan's second-biggest lender said in a statement.

Nakashima, 60, joined then-Sumitomo Bank in 1986 and has been Ohta's deputy since April. Ohta died of pancreatic cancer aged 65 on Saturday, the company said earlier this week.

(Reporting by Chang-Ran Kim; Editing by Jacqueline Wong)