When Tamao Sasada was put in charge of a large Japanese corporate client, she broke into a cold sweat. Now, the Bank of America Corp. executive is urging other female colleagues to take on new challenges as she forges a path in sustainable finance.

Then a Merrill Lynch employee in her 30s, she wasn¡¯t aware of any other women investment bankers who had been given such a big assignment in the country¡¯s male-dominated business world.

¡°Honestly speaking, I had some uneasiness,¡± Sasada, Bank of America¡¯s country head for Japan, said in a recent interview. She recalls that she would often be the only woman in meetings with clients. ¡°But after handling that work, I really felt glad that I did it ¡ª the key is ¡®just give it a try.¡¯¡±