* Q1 net profit at 122.4 bln yen vs 162.4 bln year ago
* Credit-related costs at 39 bln yen
* Keeps full-year net profit forecast at 320 bln yen (Adds details of results)
TOKYO, July 31 (Reuters) - Mizuho Financial Group said on Friday its net profit dropped 24.6% in the first quarter of its financial year as credit-related costs rose amid the coronavirus pandemic.
Japan’s third-largest lender by assets reported April-June profit of 122.4 billion yen ($1.17 billion) compared to 162.4 billion yen in the same period a year earlier.
For the current financial year through March 2021, Mizuho reiterated a forecast for profit of 320 billion yen. That compared with the 355.13 billion yen average of 12 analyst estimates compiled by Refinitiv.
Japanese banks have been struggling with ultra-low interest rates for years, and the three major lenders - Mizuho, Mitsubishi UFJ Financial Group Inc and Sumitomo Mitsui Financial Group Inc - have said credit-related costs this year would reach levels not seen since the global financial crisis.
Mizuho’s credit-related costs in the first quarter came in at 39 billion yen, up from 1.6 billion yen a year earlier, amid a surge in financial needs among Japanese companies due to the fallout from COVID-19.
The lender had estimated 200 billion yen of credit-related costs for the current financial year.
Mizuho’s net interest income was 215.1 billion yen for the first quarter, a 19.6% rise year-on-year.
Bigger rival SMFG, as well, reported last week a 60% fall in net profit for the quarter due to a rise in credit-related costs.
The country’s top lender MUFG is scheduled to announce its results on Tuesday.
$1 = 104.3600 yen Reporting by Takashi Umekawa; Editing by Tom Hogue and Muralikumar Anantharaman